Standardize Page Objects use on CE Plan Tests

This is a first iteration to address the following issue:
https://gitlab.com/gitlab-org/quality/team-tasks/issues/168

Note: depends on
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/30945

qa/qa/specs/features/browser_ui/2_plan/issue/check_mentions_for_xss_spec.rb

@@ -30,12 +30,12 @@ module QA
       end
 
       it 'user mentions a user in comment' do
-        Page::Project::Issue::Show.perform do |show_page|
-          show_page.select_all_activities_filter
-          show_page.comment('cc-ing you here @eve')
+        Page::Project::Issue::Show.perform do |show|
+          show.select_all_activities_filter
+          show.comment('cc-ing you here @eve')
 
           expect do
-            expect(show_page).to have_content("cc-ing you here")
+            expect(show).to have_content("cc-ing you here")
           end.not_to raise_error # Selenium::WebDriver::Error::UnhandledAlertError
         end
       end

qa/qa/specs/features/browser_ui/2_plan/issue/collapse_comments_in_discussions_spec.rb

@@ -15,28 +15,28 @@ module QA
 
         issue.visit!
 
-        Page::Project::Issue::Show.perform do |show_page|
+        Page::Project::Issue::Show.perform do |show|
           my_first_discussion = 'My first discussion'
 
-          show_page.select_all_activities_filter
-          show_page.start_discussion(my_first_discussion)
+          show.select_all_activities_filter
+          show.start_discussion(my_first_discussion)
           page.assert_text(my_first_discussion)
-          show_page.reply_to_discussion(my_first_reply)
+          show.reply_to_discussion(my_first_reply)
           page.assert_text(my_first_reply)
         end
       end
 
       it 'user collapses and expands reply for comments in an issue' do
-        Page::Project::Issue::Show.perform do |show_page|
+        Page::Project::Issue::Show.perform do |show|
           one_reply = "1 reply"
 
-          show_page.collapse_replies
-          expect(show_page).to have_content(one_reply)
-          expect(show_page).not_to have_content(my_first_reply)
+          show.collapse_replies
+          expect(show).to have_content(one_reply)
+          expect(show).not_to have_content(my_first_reply)
 
-          show_page.expand_replies
-          expect(show_page).to have_content(my_first_reply)
-          expect(show_page).not_to have_content(one_reply)
+          show.expand_replies
+          expect(show).to have_content(my_first_reply)
+          expect(show).not_to have_content(one_reply)
         end
       end
     end

qa/qa/specs/features/browser_ui/2_plan/issue/comment_issue_spec.rb

@@ -14,18 +14,18 @@ module QA
       end
 
       it 'user comments on an issue and edits the comment' do
-        Page::Project::Issue::Show.perform do |issue_show_page|
+        Page::Project::Issue::Show.perform do |show|
           first_version_of_comment = 'First version of the comment'
           second_version_of_comment = 'Second version of the comment'
 
-          issue_show_page.comment(first_version_of_comment)
+          show.comment(first_version_of_comment)
 
-          expect(issue_show_page).to have_content(first_version_of_comment)
+          expect(show).to have_content(first_version_of_comment)
 
-          issue_show_page.edit_comment(second_version_of_comment)
+          show.edit_comment(second_version_of_comment)
 
-          expect(issue_show_page).to have_content(second_version_of_comment)
-          expect(issue_show_page).not_to have_content(first_version_of_comment)
+          expect(show).to have_content(second_version_of_comment)
+          expect(show).not_to have_content(first_version_of_comment)
         end
       end
     end

qa/qa/specs/features/browser_ui/2_plan/issue/filter_issue_comments_spec.rb

@@ -17,25 +17,25 @@ module QA
       end
 
       it 'user filters comments and activities in an issue' do
-        Page::Project::Issue::Show.perform do |show_page|
+        Page::Project::Issue::Show.perform do |show|
           my_own_comment = "My own comment"
           made_the_issue_confidential = "made the issue confidential"
 
-          show_page.comment('/confidential', filter: :comments_only)
-          show_page.comment(my_own_comment, filter: :comments_only)
+          show.comment('/confidential', filter: :comments_only)
+          show.comment(my_own_comment, filter: :comments_only)
 
-          expect(show_page).not_to have_content(made_the_issue_confidential)
-          expect(show_page).to have_content(my_own_comment)
+          expect(show).not_to have_content(made_the_issue_confidential)
+          expect(show).to have_content(my_own_comment)
 
-          show_page.select_all_activities_filter
+          show.select_all_activities_filter
 
-          expect(show_page).to have_content(made_the_issue_confidential)
-          expect(show_page).to have_content(my_own_comment)
+          expect(show).to have_content(made_the_issue_confidential)
+          expect(show).to have_content(my_own_comment)
 
-          show_page.select_history_only_filter
+          show.select_history_only_filter
 
-          expect(show_page).to have_content(made_the_issue_confidential)
-          expect(show_page).not_to have_content(my_own_comment)
+          expect(show).to have_content(made_the_issue_confidential)
+          expect(show).not_to have_content(my_own_comment)
         end
       end
     end

qa/qa/specs/features/browser_ui/2_plan/issue/issue_suggestions_spec.rb

@@ -24,12 +24,12 @@ module QA
 
       it 'user sees issue suggestions when creating a new issue' do
         Page::Project::Show.perform(&:go_to_new_issue)
-        Page::Project::Issue::New.perform do |new_issue_page|
-          new_issue_page.add_title("issue")
-          expect(new_issue_page).to have_content(issue_title)
+        Page::Project::Issue::New.perform do |new|
+          new.add_title("issue")
+          expect(new).to have_content(issue_title)
 
-          new_issue_page.add_title("Issue Board")
-          expect(new_issue_page).not_to have_content(issue_title)
+          new.add_title("Issue Board")
+          expect(new).not_to have_content(issue_title)
         end
       end
     end