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
Yes, we can remove it since the CacheAvailabilityAttributeHandler reaches the localtopologymanager through an alternate route. Read below. I have fixed all of Pedro's suggestions. Will push shortly