Bookmark permissions scoped by group are lost after upgrading to 6.1.x/6.2.x/7

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.2.10 EE GA1, 7.0.0 Alpha 1, 7.0.0 Alpha 2
• Fix Version/s: 7.0.0 Beta 8
• Component/s: Core Infrastructure > Permissions, Social Bookmarks, ~ [Archived] Collaboration
• Labels:
  • QA-B
• Fix Priority: 2
• Git Pull Request: https://github.com/JorgeFerrer/liferay-portal/pull/588

Steps to reproduce it:
1- Startup a 6.0.x version or below.
2- Go to Control Panel/Roles/Power User/Define Permissions and search by Content/Bookmarks
3- In Bookmarks Entry section check Delete permission, limit scope to Liferay.com and Save (see permissions_6.0.12.png)
4- Upgrade to master (it's also reproducible upgrading to 6.1 or higher)
5- Go to Control Panel/Roles/Power User/Define Permissions and search by Bookmarks go to content/bookmarks

Result:
Previous permission configuration has been lost (see permissions_wrong_6.2.10.png)

Expected result:
Previous permission configuration has been kept (see permissions_ok_6.2.10.png)