Update verify qa tests to use login flow

qa/qa/specs/features/browser_ui/4_verify/ci_variable/add_ci_variable_spec.rb

@@ -4,8 +4,7 @@ module QA
   context 'Verify' do
     describe 'CI variable support' do
       it 'user adds a CI variable', :smoke do
-        Runtime::Browser.visit(:gitlab, Page::Main::Login)
-        Page::Main::Login.perform(&:sign_in_using_credentials)
+        Flow::Login.sign_in
 
         project = Resource::Project.fabricate_via_api! do |project|
           project.name = 'project-with-ci-variables'

qa/qa/specs/features/browser_ui/4_verify/pipeline/create_and_process_pipeline_spec.rb

@@ -10,8 +10,7 @@ module QA
       end
 
       it 'users creates a pipeline which gets processed' do
-        Runtime::Browser.visit(:gitlab, Page::Main::Login)
-        Page::Main::Login.perform(&:sign_in_using_credentials)
+        Flow::Login.sign_in
 
         project = Resource::Project.fabricate! do |project|
           project.name = 'project-with-pipelines'

qa/qa/specs/features/browser_ui/4_verify/runner/register_runner_spec.rb

@@ -10,8 +10,7 @@ module QA
       end
 
       it 'user registers a new specific runner' do
-        Runtime::Browser.visit(:gitlab, Page::Main::Login)
-        Page::Main::Login.perform(&:sign_in_using_credentials)
+        Flow::Login.sign_in
 
         Resource::Runner.fabricate! do |runner|
           runner.name = executor