CA-98090: (XOP-206) Block SXM when VM cannot match any bridge names on
destination.
Revert "CA-84673: Metadata import should create a network if it can't find one"

This reverts commit 99f82b7cecb961f9bf0da966a38e67bae618653b.
Add error "BRIDGE_NOT_AVAILABLE".
Merge pull request #1350 from siddharthv/CA-98090

CA-98090: (XOP-206) Block SXM when VM cannot match any bridge names on destination.