[sensu-keepalive-handler] specify in config.json
[sensu-keepalive-handler] controller role depends upon sensu-client role

this will allow plays in the controller role to use
the restart sensu-client handler that is defined in
the sensu-client role
[sensu-keepalive-handler] all roles depend on sensu-client role
[sensu-keepalive-handler] add keepalive to example
[sensu-keepalive-handler] sensu-client depends on common
[sensu-keepalive-handler] can't nest role deps.
[sensu-keepalive-handler] example needs valid sensu info for int tests
Point sensu to rabbit on the local controller node in example config.
[sensu-keepalive-handler] sensu checks need rabbit to be installed
Merge pull request #31 from blueboxgroup/sensu-keepalive-handler

Sensu keepalive handler