Merge pull request #849 from christophermay07/CONN-1203

CONN-1203
CONN-1164: Removed unused model classes
CONN-1205: Initial fixes for TB-Domain relations
CONN-1205: Removed unneeded Direct Request objects, added initial association / disassociation logic
CONN-1205: TrustBundle association and disassociation bug fixes
Merge branch 'CONN-1205' of https://github.com/christophermay07/CONNECT into CONN-1205