Update tests to use page object predicate methods

This change invoke predicate methods on page objects when
tests execute certain matchers instead of using Capybara matchers.
The result is that the matchers wait for requests and perform
logging and other functionality that the page object predicate
methods provide.

qa/qa/specs/features/browser_ui/3_create/repository/protocol_v2_push_http_spec.rb

@@ -37,8 +37,10 @@ module QA
         project.wait_for_push_new_branch
 
         # Check that the push worked
-        expect(page).to have_content(file_name)
-        expect(page).to have_content(file_content)
+        Page::Project::Show.perform do |project_page|
+          expect(project_page).to have_file(file_name)
+          expect(project_page).to have_readme_content(file_content)
+        end
 
         # And check that the correct Git protocol was used
         expect(git_protocol_reported).to eq(git_protocol)

qa/qa/specs/features/browser_ui/3_create/repository/push_mirroring_lfs_over_http_spec.rb

@@ -37,8 +37,10 @@ module QA
 
         # Check that the target project has the commit from the source
         target_project.visit!
-        expect(page).to have_content('README.md')
-        expect(page).to have_content('The rendered file could not be displayed because it is stored in LFS')
+        Page::Project::Show.perform do |project_page|
+          expect(project_page).to have_file('README.md')
+          expect(project_page).to have_readme_content('The rendered file could not be displayed because it is stored in LFS')
+        end
       end
     end
   end

qa/qa/specs/features/browser_ui/3_create/repository/push_over_http_spec.rb

@@ -36,8 +36,10 @@ module QA
 
         project.visit!
 
-        expect(page).to have_content('README.md')
-        expect(page).to have_content("This is a test project named #{project.name}")
+        Page::Project::Show.perform do |project_page|
+          expect(project_page).to have_file('README.md')
+          expect(project_page).to have_readme_content("This is a test project named #{project.name}")
+        end
       end
     end
   end

qa/qa/specs/features/ee/browser_ui/3_create/repository/pull_mirroring_over_http_spec.rb

@@ -35,9 +35,12 @@ module QA
 
         # Check that the target project has the commit from the source
         target_project.visit!
-        expect(page).to have_content("README.md")
-        expect(page).to have_content("This is a pull mirroring test project")
-        expect(page).to have_content("Mirrored from #{masked_url(source_project_uri)}")
+
+        Page::Project::Show.perform do |project|
+          expect(project).to have_file('README.md')
+          expect(project).to have_readme_content('This is a pull mirroring test project')
+          expect(project).to have_text("Mirrored from #{masked_url(source_project_uri)}")
+        end
       end
 
       def masked_url(url)

qa/qa/specs/features/ee/browser_ui/3_create/repository/pull_mirroring_over_ssh_with_key_spec.rb

@@ -58,9 +58,11 @@ module QA
 
         # Check that the target project has the commit from the source
         target_project.visit!
-        expect(page).to have_content('README.md')
-        expect(page).to have_content('This is a pull mirroring test project')
-        expect(page).to have_content("Mirrored from #{masked_url(source_project_uri)}")
+        Page::Project::Show.perform do |project|
+          expect(project).to have_file('README.md')
+          expect(project).to have_readme_content('This is a pull mirroring test project')
+          expect(project).to have_text("Mirrored from #{masked_url(source_project_uri)}")
+        end
       end
 
       def masked_url(url)