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

Added unit test for update_vca_status method for KNF

Change-Id: Iba6285d0d5deeaa7bef685a22abeba0ae535ab19
Signed-off-by: jayaramans <selvi.j@tataelxsi.co.in>
Signed-off-by: ksaikiranr <saikiran.k@tataelxsi.co.in>