Initial stab at monitoring_check::cluster
rename check, add relevant EM calls
invoke check-aggregate in a subshell to avoid exit-hell
make things run and dump payload to output
drop debugging, print json in the end
include cluster name in lock key, handle unexpired locks
drop options, write to socket, fix puppet code
drop more options, fix payload, fix puppet
stop relying on check-aggregate and drop rest-client dependency
replace em-redis with tiny redis client
close redis socket, fix path, fix tests
Merge pull request #3 from Yelp/u/maksym/cluster_check

monitoring_check::cluster