CP-17656: Copy PVS metadata on pool join
CP-17656: Copy PVS metadata on pool join

1) PVS site record must be copied when no PVS site with the
same name is found on the Pool.
2) If any PVS site match is found on the Pool then
PVS server record must not be copied else PVS server record
must copied as part of existing PVS site.

Signed-off-by: Sharad Yadav <0ab5d8dd51ae0f2f9ed283cbbbb7a94d110e3347@citrix.com>

euanh/xen-api,euanh/xen-api,thomassa/xen-api,srowe/xen-api,thomassa/xen-api,srowe/xen-api,euanh/xen-api,srowe/xen-api,Frezzle/xen-api,thomassa/xen-api,Frezzle/xen-api,srowe/xen-api,euanh/xen-api,Frezzle/xen-api,euanh/xen-api,thomassa/xen-api,thomassa/xen-api,Frezzle/xen-api,thomassa/xen-api,Frezzle/xen-api,euanh/xen-api,srowe/xen-api