Update API spec to support multi-tenants

Enable multicloud to support multi-tenants
of a cloud region while being backward compatible
which support the default tenant

Change-Id: I0b82e9dfb1e279c5adf780c06d26e2278f7d47d7
Issue-ID: MULTICLOUD-528
Signed-off-by: Bin Yang <bin.yang@windriver.com>
2 files changed