CTOR-1901 mariadb galera cluster new mode

[garnier-quentin]

Community contributors

Description

A new mode to monitor galera-cluster

Type of change

• Patch fixing an issue (non-breaking change)
• New functionality (non-breaking change)
• Functionality enhancement or optimization (non-breaking change)
• Breaking change (patch or feature) that might cause side effects breaking part of the Software

How this pull request can be tested ?

$ perl centreon_plugins.pl --plugin=database::mysql::plugin --host=10.200.11.191 --username='srv_centreon' --password='xxxx' --mode=galera-cluster --verbose
OK: node status: synced [ready: on], cluster status: primary, cluster size: 3 | 'node.receive.queue.average.count'=0.00464;;;0; 'node.send.queue.average.count'=0.00460;;;0; 'cluster.size.count'=3;;;0;

Checklist

• I have followed the coding style guidelines provided by Centreon
• I have commented my code, especially hard-to-understand areas of the PR.
• I have rebased my development branch on the base branch (develop).
• I have provide data or shown output displaying the result of this code in the plugin area concerned.