ivs: move CFR functions from OVSDriver to ivs

A few macros needed to be moved as well.
pass ind_ovs_parsed_key to pipeline instead of CFR

This is a step on the path to removing the CFR as a core datastructure. The
pipeline can translate the OVS key to a CFR if it needs to.
Merge into master from pull request #106:
pass ind_ovs_parsed_key to pipeline instead of CFR (https://github.com/floodlight/ivs/pull/106)