Initial commit of collectd_plugins cookbook.
modified to reflect collectd-plugins cookbook name
Merge pull request #1 from mancdaz/master

s/collectd_plugins/collectd-plugins/
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Add rabbitmq plugin

plugin from https://github.com/phrawzty/rabbitmq-collectd-plugin
I asked them to add a license and they made it apache 2.

Added a default PID_FILE to the plugin
Merge pull request #2 from littleidea/master

Add rabbitmq plugin
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