Updated openstack/openstack
Project: openstack/heat  9b44d98a7db5db2d8a535e83ce24f528ffc51ff1

Refactor functions in eip.py

Refactor functions in eip.py for some similar codes.

Implements blueprint implement-ec2eip-updatable

Change-Id: I44d49fd1cc126b5cc318b9ccbe317623f6170ccf