Avoid using built-in function name
Avoid using built-in function name

Avoid using built-in function name. Here filter is a built-in
function name. As per python standard we should not use it.

Change-Id: I6a005ca55d42dd41f9ac0b482bee056a23671190

openstack/tacker,trozet/tacker,openstack/tacker,zeinsteinz/tacker,openstack/tacker,stackforge/tacker,trozet/tacker,priya-pp/Tacker,zeinsteinz/tacker,stackforge/tacker,priya-pp/Tacker