Resolved 1684 - MON fails to collect metrics from an OpenStack VIM with...

Resolved 1684 - MON fails to collect metrics from an OpenStack VIM with metrics support if there is another OpenStack VIM without metrics support registered

Change-Id: I3a0a737292975b8cbdfb0b3cb5d4549e56679334
Signed-off-by: Atul Agarwal <Atul.Agarwal@Altran.com>