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Merge pull request #1 from ministryofjustice/pvb-cleanup

Pvb cleanup
Added sensu graphite check macros
Added sensu_check_host_graphite test case to client.sls
Reset default redis and rabbitmq hosts to monitoring.local
Added checks for collectd and cron
Don't define host check in server.sls
Remove cron check from server - we want to assert this on all machines
Added metric_prefix variable name
Tidied up sensu_check_host_graphite to use :::metric_prefix:::
Updated check_graphite syntax
Update plugin path and change to new format salt layout
Added file_mode and dir_mode
Invalid path in sensu community plugin calls
Added descriptions
Shorted the CRITICAL/WARNING output string
Updated CHANGELOG
Update CHANGELOG to note breaking change