Refactor create issue end-to-end test

This refactor:
- Moves the tests pre-conditions to a before blocks
- Creates an issue via the api for the second test to improve the
test suite performance

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

@@ -5,8 +5,15 @@ module QA
     describe 'Issue creation' do
       let(:issue_title) { 'issue title' }
 
+      before do
+        Runtime::Browser.visit(:gitlab, Page::Main::Login)
+        Page::Main::Login.perform(&:sign_in_using_credentials)
+      end
+
       it 'user creates an issue' do
-        create_issue
+        Resource::Issue.fabricate_via_browser_ui! do |issue|
+          issue.title = issue_title
+        end
 
         Page::Project::Menu.perform(&:click_issues)
 
@@ -18,9 +25,15 @@ module QA
           File.absolute_path(File.join('spec', 'fixtures', 'banana_sample.gif'))
         end
 
-        it 'user comments on an issue with an attachment' do
-          create_issue
+        before do
+          issue = Resource::Issue.fabricate_via_api! do |issue|
+            issue.title = issue_title
+          end
+
+          issue.visit!
+        end
 
+        it 'user comments on an issue with an attachment' do
           Page::Project::Issue::Show.perform do |show|
             show.comment('See attached banana for scale', attachment: file_to_attach)
 
@@ -36,15 +49,6 @@ module QA
           end
         end
       end
-
-      def create_issue
-        Runtime::Browser.visit(:gitlab, Page::Main::Login)
-        Page::Main::Login.perform(&:sign_in_using_credentials)
-
-        Resource::Issue.fabricate_via_browser_ui! do |issue|
-          issue.title = issue_title
-        end
-      end
     end
   end
 end