update indigo

* submodules/indigo da68342...8fcbf0f (1):
  > Merge into master from pull request #117: update submodules (https://github.com/floodlight/indigo/pull/117)
update infra

* submodules/infra 9bccd30...101ed4b (2):
  > Merge into master from pull request #22: Updates for use in shared libraries.  (https://github.com/floodlight/infra/pull/22)
  > Merge into master from pull request #20: AIM: add early check for log level (https://github.com/floodlight/infra/pull/20)
update loxigen-artifacts

* submodules/loxigen-artifacts 03c51fd...a592075 (6):
  > Artifacts from https://github.com/floodlight/loxigen/compare/68c19db0fa9a4465577ce17947e04bfb0bb88bf4...ac2a2da3d8ce47f2591899fac634873bd1e2cb60
  > Artifacts from https://github.com/floodlight/loxigen/compare/1c5679af766cc2785f088707e83dbd5b6ac0a698...68c19db0fa9a4465577ce17947e04bfb0bb88bf4
  > Artifacts from https://github.com/floodlight/loxigen/compare/ffa04cc24b045e010c3020e2cbb8ce31cbec8895...1c5679af766cc2785f088707e83dbd5b6ac0a698
  > Artifacts from https://github.com/floodlight/loxigen/compare/27a64222e92b38e23b253657c702986c0604145a...ffa04cc24b045e010c3020e2cbb8ce31cbec8895
  > Artifacts from https://github.com/floodlight/loxigen/compare/24b6c19d413555f2aaf9129c552f5128964fefe8...27a64222e92b38e23b253657c702986c0604145a
  > Artifacts from https://github.com/floodlight/loxigen/compare/767b11df765065ac1f815ceeb27690747b67fb09...24b6c19d413555f2aaf9129c552f5128964fefe8
OVSDriver: replace set-field OXM hack

The updated loci has a proper accessor for this.
OVSDriver: fix a getifaddrs leak
update indigo

* submodules/indigo 8fcbf0f...2e7089b (1):
  > Merge into master from pull request #113: SocketManager: use a timer wheel (https://github.com/floodlight/indigo/pull/113)
update infra

* submodules/infra 101ed4b...1bde450 (1):
  > Merge into master from pull request #21: modify log time format (https://github.com/floodlight/infra/pull/21)
Merge into master from pull request #144:
Update submodules and replace set-field OXM hack (https://github.com/floodlight/ivs/pull/144)