ISPN-4890 Entry iterator should throw AvailabilityException in degraded
mode

* Check availability before allowing iteration
* Listen for availability changes while processing iteration
ISPN-4904 PartitionHandlingInterceptor should not do checks when
Flag.CACHE_MODE_LOCAL is supplied

* Skip partition checks when local flag is provided
ISPN-4675 Missing server configuration for remote executor thread pool

Add server configuration for the remote command executor and the total order executor.
IgnoreReturnValueForConditionalOperationsTxTest wasn't really testing transactional mode.