BUG FIXES:
resource/vm: Skip SCSI controller check when empty. (#1179)
resource/vm: Make storage_policy_id computed to prevent flapping when unset. (#1185)
resource/vm: Ignore nil objects in host network on read. (#1186)
resource/vm: Keep progress channel open when deploying an OVF. (#1187)
resource/vm: Set SCSI controller type to unknown when nil. (#1188)
IMPROVEMENTS:
resource/content_library_item: Add local upload, OVA, and vm-template sources. (#1196)
resource/content_library: Subscription and publication support. (#1197)
resource/vm: Content library vm-template, disk type, and vApp property support. (#1198)