Metacat

Use Lock instead of ILock to be consistent across classes.

evict the HazelCast SystemMetadata entry if we update the access control rules via Metacat's legacy API, otherwise stale SystemMetadata stays in memory instead of being looked up from the backing table store.

Set a default HazelcastInstance after init() is called, and use this instance in getLock() to acquire a lock in the cluster.

use shared method for looking up "docInfo" map -- both in Metacat replication and in D1 system metadata generation

When using ILock.lock(), get a lock on the string value of the Identifier, not the Identifier object itself. Hazelcast locking won't work otherwise.

Use the Hazelcast ILock mechanism to lock the system metadata identifier rather than using IMap.lock(pid).

delete system metadata when MN.delete() is called.

make MNodeServiceTest pass JUnit testing

return null instead of throwing an exception when pid is not found in store

comment out resynch() method until errors are resolved