Merge pull request #18 from gnubila-france/add_client_authorization_to_activemq

Add client authorization to activemq
Merge pull request #17 from gnubila-france/add_client_identity_configuration

Add client identity configuration
Fix defaults for client credentials
Default identity is fqdn #17
Allow mcollective to access mcollective.nodes queue.
Merge pull request #19 from gnubila-france/fix_activemq_authorization_debian

Allow mcollective to access mcollective.nodes queue.
Allow to configure periodic registration for mcollective servers.
Import shellcmd plugin.
Update from slivare repo.
Allow to configure ActiveMQ systemUsage limits.
Merge branch 'add_shellcmd_plugin' into merge_all_fixes
Merge branch 'add_system_usage_configuration' into merge_all_fixes