CA-38014: Pool.create_VLAN_from_PIF should not try to create VLANs on offline hosts
CA-38014: Pool.create_VLAN_from_PIF should not try to create VLANs on offline hosts

When the hosts come online again, the startup sequence will copy the VLANs from the master.

Signed-off-by: Rob Hoes <8783b3376fb07d39edffc8d7da68a6de3874a7e6@citrix.com>

johnelse/xcp-rrdd,koushikcgit/xcp-networkd,koushikcgit/xcp-rrdd,djs55/xcp-networkd,koushikcgit/xcp-rrdd,djs55/squeezed,robhoes/squeezed,simonjbeaumont/xcp-rrdd,johnelse/xcp-rrdd,sharady/xcp-networkd,simonjbeaumont/xcp-rrdd,djs55/xcp-rrdd,djs55/xcp-networkd,koushikcgit/xcp-networkd,djs55/xcp-rrdd,sharady/xcp-networkd,koushikcgit/xcp-rrdd