BDef - Tag associations not removed from index when Tag deleted

[nateiam]

Steps to reproduce:

• Locate a Tag that is a child in a hierarchy
• Locate a Data Entity that has been tagged with the Tag above
• Go to the Category Page for the parent Tag and then to the Related Data Entities tab, view the Data Entity from the previous step. It is present because of it's association to the child Tag.
• Delete the child Tag
• Wait a few seconds for ES to update
• Go to the Category Page for the parent Tag again and and then to the Related Data Entities tab
• The Data Entity will still be listed in the Related Data Entities tab

Defective behavior:

• The Data Entity should no longer be listed as the child Tag and it's association to the Data Entity have been removed.
• Tech Note - repository knows about the update but ES does not

Expected behavior

• The Data Entity is no longer listed because the delete information is propagated to ES