core: Adding SANState for Storage Domain Static

Adding transitive attribute of SANState to Storage Domain Static, so it
will be initialized when calling vdsCommand
HSMGetStorageDomainInfoVDSCommand.

Change-Id: I044676a8707846a51e9028dc67410d3ee944c747
Signed-off-by: Maor Lipchuk <mlipchuk@redhat.com>