add-deployment-name-to-mysql-and-system-dashboard

[ldangeard-orange]

This PR completes PR #271

MySQL Dashboard :

• add deployment name list box for select your deployment (only the IP currently)
• set the current value of the mysql_global_status_wsrep_cluster_size and not average for the last hour

System Dashboard :

• add list box for select : Environnent, Director, Deployment, Job (same as System: Disk Space Evol Dasboard)