Rebalance acceptance test shards

cms/djangoapps/contentstore/features/html-editor.feature

-@shard_3
+@shard_2
 Feature: CMS.HTML Editor
   As a course author, I want to be able to create HTML blocks.
 

cms/djangoapps/contentstore/features/problem-editor.feature

-@shard_3
+@shard_1
 Feature: CMS.Problem Editor
   As a course author, I want to be able to create problems and edit their settings.
 

cms/djangoapps/contentstore/features/signup.feature

-@shard_3
+@shard_2
 Feature: CMS.Sign in
   In order to use the edX content
   As a new user

cms/djangoapps/contentstore/features/static-pages.feature

-@shard_3
+@shard_2
 Feature: CMS.Static Pages
     As a course author, I want to be able to add static pages
 

cms/djangoapps/contentstore/features/textbooks.feature

-@shard_3
+@shard_2
 Feature: CMS.Textbooks
 
   Scenario: No textbooks

cms/djangoapps/contentstore/features/transcripts.feature

 @shard_3
-Feature: Video Component Editor
+Feature: CMS.Transcripts
   As a course author, I want to be able to create video components.
 
     # For transcripts acceptance tests there are 3 available caption

cms/djangoapps/contentstore/features/upload.feature

-@shard_3
+@shard_2
 Feature: CMS.Upload Files
     As a course author, I want to be able to upload files for my students