ISPN-4825 Add JMX/DMR operation to change the availability mode of the partition

https://issues.jboss.org/browse/ISPN-4825

Add availability change operation to LocalTopologyManager, AdvancedCache,
and the Cache JMX MBean.
Move the CacheAvailability DMR attribute from the metrics to the resources and make it writable
there are some unused imports in this list :)