update loci to a2f9d95f4dca2a6e8f581cae42077ef8a6337536

 * Add, modify, and delete subclasses for group_mod.
 * Support instruction IDs.
OFStateManager: break group_mod handler into one per subclass
update bigcode

This pulls in BigHash.

* submodules/bigcode a43da15...6873964 (30):
  > -Werror should be disabled due to redefines inherited from Python.
  > Merge into master from pull request #8: Initial DHCP parsing support.  (https://github.com/floodlight/bigcode/pull/8)
  > Merge into master from pull request #6: VPI Targets (https://github.com/floodlight/bigcode/pull/6)
  > Merge into master from pull request #7: Enhance ICMP definitions. (https://github.com/floodlight/bigcode/pull/7)
  > Remove trailing whitespace.
  > Update name.
  > Merge into master from pull request #5: vpitool and VPI TAP interface. (https://github.com/floodlight/bigcode/pull/5)
  > Merge into master from pull request #2: Support for LACP and LLDP Parsing (https://github.com/floodlight/bigcode/pull/2)
  > Set ROOT.
  > Merge into master from pull request #1: Update module autogeneration scripts. (https://github.com/floodlight/bigcode/pull/1)
  > Latest.
  > Publishing updates.
  > Initial.
  > Documentation updates.
  > Import from internal repository.
  > Initial.
  > Comment cleanup.
  > Comment cleanup.
  > Comment cleanup.
  > Comment cleanup.
  > Comment cleanup.
  > Comment cleanup.
  > Comment cleanup.
  > Import from internal repository.
  > Import from internal repository.
  > Import from internal repository.
  > Update README.md
  > Update to new repository location.
  > Submodules should be not updated recursively.
  > Update latest.
OFStateManager: use a hashtable to lookup groups by ID
Merge into master from pull request #74:
Update LOCI and fix group fallout (https://github.com/floodlight/indigo/pull/74)