update indigo

* submodules/indigo 5be8592...d2388fa (3):
  > Merge into master from pull request #177: Convert LOCI list iteration to of_object_t (https://github.com/floodlight/indigo/pull/177)
  > Merge into master from pull request #174: Port lookup/refcount functionality from group table to gentables (https://github.com/floodlight/indigo/pull/174)
  > Merge into master from pull request #175: OFConnectionManager: allow blocking barriers on nonexistent connections (https://github.com/floodlight/indigo/pull/175)
update loxigen-artifacts

* submodules/loxigen-artifacts b44eb26...a75dc82 (1):
  > Artifacts from https://github.com/floodlight/loxigen/compare/7e1551e20d91ac10d478843c6f4858ac60257d65...b34bd717880b534e70172081e5b5a94ee629dd43
convert LOCI list iteration to of_object_t

The inheritance unions used previously are going away.
Merge into master from pull request #212:
convert LOCI list iteration to of_object_t (https://github.com/floodlight/ivs/pull/212)