Some modules are defined under different library in "Pike" release. Issues:Some modules are defined under different library in "Pike" release. Fixes #<issueid>
Some modules are defined under different library in "Pike" release.
Issues:Some modules are defined under different library in "Pike" release.
Fixes #<issueid>

Problem: Changes to the driver to make it "pike" release compatible.

Analysis: The module "portbindings.VNIC_NORMAL" is defined under different
          library in Pike. Made the required change.

Tests: Changes to the driver to make it "pike" release compatible.

F5Networks/f5-openstack-lbaasv2-driver,jputrino/f5-openstack-lbaasv2-driver,F5Networks/f5-openstack-lbaasv2-driver,jputrino/f5-openstack-lbaasv2-driver