Upgrade to Capybara 3

Gemfile

Gemfile.lock

spec/features/commits_spec.rb

spec/features/ics/dashboard_issues_spec.rb

spec/features/ics/group_issues_spec.rb

spec/features/ics/project_issues_spec.rb

...features/merge_request/user_accepts_merge_request_spec.rb

...tures/merge_request/user_creates_image_diff_notes_spec.rb

spec/features/merge_request/user_sees_diff_spec.rb

spec/features/merge_request/user_sees_merge_widget_spec.rb

...tures/merge_request/user_suggests_changes_on_diff_spec.rb

spec/features/projects/commits/user_browses_commits_spec.rb

spec/features/projects/features_visibility_spec.rb

spec/features/projects/files/undo_template_spec.rb

spec/features/projects/files/user_creates_files_spec.rb

spec/features/projects/labels/user_removes_labels_spec.rb

spec/features/projects/pipelines/pipeline_spec.rb

spec/features/projects/settings/integration_settings_spec.rb

spec/features/projects/tree/upload_file_spec.rb

spec/features/search/user_searches_for_commits_spec.rb