ISPN-4645 Many XSD default values do not match the defaults from the
corresponding configuration builder

Updated XSD and server code for state transfer chunk size property
default value
ISPN-4858  SoftIndexFileStoreTest.testStoreAndRemove random failures
ISPN-4819 Fix the pages that are shown when connecting to the management port
ISPN-4784 TestResourceTracker not working properly for OSGi tests
ISPN-4673 Split-brain: get() returns null when all owners are removed
from view

* If get returns null, check that at least one owner is in the cluster.
* Replace RpcException with AvailabilityException if there are no valid
  answers.