Feature-9904: Enhancing NG-UI to enable Juju operational view dashboard

Implemented functions to receive vcaStatus update message from kafka
and update nsr record in mongo.
Addressed review comments

Change-Id: I54f526c74fd27328c88721002d41bd85a182f9eb
Signed-off-by: Priyadharshini G S <priyadharshini.g@tataelxsi.co.in>
Signed-off-by: ksaikiranr <saikiran.k@tataelxsi.co.in>