Group notified on member unmanaged

- and member notified on group unmanaged.
- done automatically, without need for registering listeners.
- will be generalised to “relationships” at some point.
Deprecate DynamicGroup.stop
Deserialize: discard dangling ref in ImmutableSet

- If didn’t then it would fail to deserialise, which would cause 
  entire file to fail to deserialise.
  The dangling ref will have been logged plus handled by the 
  RebindExceptionHandler, so mostly harmless ignoring it here.
Fix logging on Effectors.invoke
Tidy QuarantineGroup.expungeMembers
BROOKLYN-14: exception handling for rebind policies

- Also adds PersistenceExceptionHandler
BROOKLYN-14: policy+enricher persistence/rebind enabled
BROOKLYN-14: rebind policies in separate phase

- Only add policies+enrichers to entities after all entities have had
  their state set, and all relationships (parent-child, 
  group membership, locations) have been set up
- Also corrects spelling of “doReconsruct” in BasicPolicyRebindSupport
  etc
- Improves comments in RebindManagerImpl on rebind’s phases
Testing performance of entity persistence
Covert perf tests from groovy to java
FileBasedObjectStore.put: try rename before mv

- system call for `mv` is *very* expensive (about 20ms on my machine),
  and CPU intensive, versus `file.rename` which is < 1ms.
- This change therefore allows us to persist 1000s of entities per
  second, rather than < 50 (because done single-threaded currently).
This closes #29
Add comments for #29.
This closes #10
import of brooklyncentral/camp-server dependency to apache brooklyn project
osgi wip
Ground work to load classes from bundles in blueprints
Adds context element to catalogue entries
Fix infinite recursion in Osgis.getBundle
Incorporate loading from bundles into BrooklynEntityClassResolver