allow empty permission fields

fixes https://github.com/puppetlabs/puppetlabs-rabbitmq/issues/172
add tests for empty permission fields
Enabling STOMP plugin when it should be configured and the service managed
Adding $stomp_ensure variable to control the Stomp plugin.
Remove problematic package dependency

This dependency is already defined in the rabbitmq::repo::rhel class
and fails altogether when $manage_repos is set to false. I don't
understand why the tests don't catch that though.
Merge pull request #191 from ckaenzig/fix-package-dependency

Remove problematic package dependency
Merge pull request #183 from DECK36/pull-req-permissions

allow empty permission fields
Requested changes
added property tags to rabbitmq_user provider. This allows to optionally set further tags like monitoring or policymaker to a rabbitmq user
Merge pull request #181 from magmax/master

Enabling STOMP plugin when it should be configured and the service managed
rabbitmq_plugins is in a funny place on RHEL.
Merge pull request #194 from mhaskel/rhel-fixes

rabbitmq_plugins is in a funny place on RHEL.
Prepare for 4.0.0 release
Merge pull request #195 from mhaskel/prepare-4.0.0

Prepare for 4.0.0 release
Editing README to add additional dependancies on debian

The erlang version provided in the official debian repository
 doesn't handle SSL ciphers used by puppet (when used as a CA)
The more recent version offered by the erland repo (as set up
 by the erland module) alleviates this.
Merge pull request #197 from frconil/update-readme

Editing README to add additional dependancies on debian
adding ssl_only parameter, which disables all non-encrypted tcp listeners
Adding missing ssl_ parameters from rabbitmq::config class
$ssl_verify and  $ssl_fail_if_no_peer_cert were missing from rabbitmq::config
class.  This was causing the 'false' values to not be populated in
rabbitmq.config (at least for the future parser in Puppet 3.5.1)
Fix rabbitmq.config.erb to allow ldap auth without configuring stomp
ssl_only and ssl parameter info in README