rhel > 6 do not require python-importlib
rhel > 6 do not require python-importlib

Change-Id: Ib261cbf166ff65985ffe8e44ec23baea3463a33c

fpytloun/contrail-packages,Juniper/contrail-packages,Juniper/contrail-packages,tcpcloud/contrail-packages,vpramo/contrail-packages