WSO2 G-REG is slow when viewing artifacts in Store & Publisher

[CrowleyRajapakse]

Description:
If there are many associations(500 max) per artifact(Ex: Contacts artifact), when retrieving the contacts in store it's giving ThreadDeath errors with status code 500.

Suggested Labels:
GREG 5.3

Affected Product Version:
GREG 5.3

Steps to reproduce:

1. ) Click on contacts with just one association. It should display quickly.
   2.) Create many associations per one Contact and try to click that contact.