also condense migrations into a single one

Don't raise exception when allocating existing host/network or deleting non-existent ones

Changed minimum links to number of members, added a confirmation page for the minimum links value and  made interface description optional.

for better managing tasks inside ansible role

An additional step for checking TWAMP status

Despite the fact the syntax is absolutely valid.

Updated delete Netbox device functionality to delete the device if it exists and don't raise AttributeError.