Update RabbiMQ's documentation.
Update RabbiMQ's documentation.

* use kubectl instead of make
* fix issue with added new line to generated erlang cookie
* add section about RBAC
* add cluster status section
* add uninstall application section

GoogleCloudPlatform/click-to-deploy,GoogleCloudPlatform/click-to-deploy,GoogleCloudPlatform/click-to-deploy,GoogleCloudPlatform/click-to-deploy,GoogleCloudPlatform/click-to-deploy,GoogleCloudPlatform/click-to-deploy