EntityNotFoundException: respect debug_mode global
slbv2 bugfixes

* SLB config was generated incrorrectly when multiple rspools were
  linked with the same balancer-vsg pair.
* sha1-based vsg unique name generation was not working

generateSLBConfig2: virtual_services array is local to triplet, not to
	vsg
makeUniqueVSGName: $vsg['keys'] was used instead of $keys
bugfix: remote ifname shortening in CDP/LLDP

Since we need to know the device breed of the remote device to shorten
its ifname, it is hard to be done in deviceconfig handlers. So the
getlldpstatus/getcdpstatus queries now return the original remote port
names. The shortening is performed in renderDiscoveredNeighbors, where
the remote object id is already known.