update indigo
update indigo

* submodules/indigo 23d2cf1...e5711ee (1):
  > Merge into master from pull request #203: OFConnectionManager2: silence clang warning (https://github.com/floodlight/indigo/pull/203)

vezril/ivs,vezril/ivs,floodlight/ivs,floodlight/ivs,vezril/ivs,floodlight/ivs