ISPN-4950 Add ability to merge defaults into Metadata passed as param

* This is required in order to be able to apply default lifespan and
max idle settings configured globally for the cache.
* To do so, a new method has been added to builder that allows a
Metadata object to be merged with the builder instance.
* By making the default metadata builder implementation use objects
for primitives, it can easily distinguish between those settings
that have been set by the user versus the builder defaults.
'Release Script: update versions for 7.0.2-SNAPSHOT'
ISPN-4949 Split brain: data updated in degraded mode

* Don't update the cache topology after a JGroups view update
  until we know all the members are accessible.
* Move PartitionHandlingInterceptor above StateTransferInterceptor
* Check availability again when catching a SuspectException in
  PartitionHandlingInterceptor
* Fix NPE when receiving a null response for a START_STATE_TRANSFER command
* CacheClusterStatus.doHandleClusterView now uses the most up-to-date
  view's members.
* Add a waitForViewId method in JGroupsTransport.
* StateTransferInterceptor must retry with the same cache topology
  if the JGroups view was outdated.
ISPN-4949 Use FD_ALL2 instead of FD in the default JGroups configuration
ISPN-4949 Add a list of actual members to the cache topology

It is different from the CH's list of members in degraded mode