XOP-656/CA-171363: Fix PIF carrier pass through in the presence of unplugged VLANs
XOP-656/CA-171363: Fix PIF carrier pass through in the presence of unplugged VLANs

Catch exceptions raised by Bridge.get_interfaces, because the bridge may not
exist. No bridge means no VIFs means no carrier needs to be set. But we still
need to check the remaining bridges.

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

rafalmiel/xen-api,robertbreker/xen-api,vasilenkomike/xen-api,euanh/xen-api,agimofcarmen/xen-api,guard163/xen-api,anoobs/xen-api,jjd27/xen-api,anoobs/xen-api,vasilenkomike/xen-api,Frezzle/xen-api,djs55/xen-api,agimofcarmen/xen-api,jjd27/xen-api,srowe/xen-api,guard163/xen-api,thomassa/xen-api,jjd27/xen-api,koushikcgit/xen-api,agimofcarmen/xen-api,guard163/xen-api,rafalmiel/xen-api,anoobs/xen-api,koushikcgit/xen-api,guard163/xen-api,rafalmiel/xen-api,salvocambria/xen-api,anoobs/xen-api,jjd27/xen-api,srowe/xen-api,simonjbeaumont/xen-api,euanh/xen-api,simonjbeaumont/xen-api,koushikcgit/xen-api,djs55/xen-api,salvocambria/xen-api,rafalmiel/xen-api,agimofcarmen/xen-api,djs55/xen-api,salvocambria/xen-api,djs55/xen-api,vasilenkomike/xen-api,guard163/xen-api,robertbreker/xen-api,jjd27/xen-api,euanh/xen-api,anoobs/xen-api,srowe/xen-api,Frezzle/xen-api,djs55/xen-api,thomassa/xen-api,thomassa/xen-api,salvocambria/xen-api,agimofcarmen/xen-api,rafalmiel/xen-api,euanh/xen-api,vasilenkomike/xen-api,thomassa/xen-api,simonjbeaumont/xen-api,rafalmiel/xen-api,srowe/xen-api,robertbreker/xen-api,simonjbeaumont/xen-api,koushikcgit/xen-api,anoobs/xen-api,euanh/xen-api,Frezzle/xen-api,simonjbeaumont/xen-api,Frezzle/xen-api,guard163/xen-api,koushikcgit/xen-api,simonjbeaumont/xen-api,euanh/xen-api,vasilenkomike/xen-api,jjd27/xen-api,salvocambria/xen-api,Frezzle/xen-api,agimofcarmen/xen-api,thomassa/xen-api,robertbreker/xen-api,srowe/xen-api,salvocambria/xen-api,djs55/xen-api,robertbreker/xen-api,koushikcgit/xen-api,robertbreker/xen-api,vasilenkomike/xen-api,thomassa/xen-api