modifications to rocon_gateway_tests to figure out current issues with synchronization
fix crash on network disconnectivity. closes #228
testing hub loss detection. #228
added a info message before initiating hub disconnect. It may take upto 30 seconds for the RedisListenerThread to exit gracefully. #228
nasty fix for thrown attribute errors when connections in the redis connection pool disconnect. #228
Merge branch 'hydro-devel' of https://github.com/robotics-in-concert/rocon_multimaster into establish_synchronization_semantics
Merge pull request #230 from piyushk/establish_synchronization_semantics

Establish synchronization semantics + Fix crash on loss of connectivity