Move tags out to containing feature

We can currently reduce the number of times we specify the tag of a
given example group by moving them hoisting them up one level to the
containing `feature`

qa/qa/specs/features/login/standard_spec.rb

 module QA
-  feature 'standard root login' do
-    scenario 'user logs in using credentials', :core do
+  feature 'standard root login', :core do
+    scenario 'user logs in using credentials' do
       Page::Main::Entry.act { sign_in_using_credentials }
 
       # TODO, since `Signed in successfully` message was removed

qa/qa/specs/features/mattermost/group_create_spec.rb

 module QA
-  feature 'create a new group' do
-    scenario 'creating a group with a mattermost team', :mattermost do
+  feature 'create a new group', :mattermost do
+    scenario 'creating a group with a mattermost team' do
       Page::Main::Entry.act { sign_in_using_credentials }
       Page::Main::Menu.act { go_to_groups }
 

qa/qa/specs/features/project/create_spec.rb

 module QA
-  feature 'create a new project' do
-    scenario 'user creates a new project', :core do
+  feature 'create a new project', :core do
+    scenario 'user creates a new project' do
       Page::Main::Entry.act { sign_in_using_credentials }
 
       Scenario::Gitlab::Project::Create.perform do |project|

qa/qa/specs/features/repository/clone_spec.rb

 module QA
-  feature 'clone code from the repository' do
-    context 'with regular account over http', :core do
+  feature 'clone code from the repository', :core do
+    context 'with regular account over http' do
       given(:location) do
         Page::Project::Show.act do
           choose_repository_clone_http
@@ -30,7 +30,7 @@ module QA
         end
       end
 
-      scenario 'user performs a deep clone', :core do
+      scenario 'user performs a deep clone' do
         Git::Repository.perform do |repository|
           repository.location = location
           repository.use_default_credentials
@@ -41,7 +41,7 @@ module QA
         end
       end
 
-      scenario 'user performs a shallow clone', :core do
+      scenario 'user performs a shallow clone' do
         Git::Repository.perform do |repository|
           repository.location = location
           repository.use_default_credentials

qa/qa/specs/features/repository/push_spec.rb

 module QA
-  feature 'push code to repository' do
+  feature 'push code to repository', :core do
     context 'with regular account over http' do
-      scenario 'user pushes code to the repository', :core do
+      scenario 'user pushes code to the repository'  do
         Page::Main::Entry.act { sign_in_using_credentials }
 
         Scenario::Gitlab::Project::Create.perform do |scenario|