ISPN-5011 CacheManager not stopping when search factory not initialized
[ISPN-4645] Many XSD default values do not match the defaults from the
corresponding configuration builder

Updated core XSD for state transfer chunk size property default value
ISPN-3938 AdvancedAsyncCacheLoader.process() concurrency issues

Simplify ExecutorAllCompletionService to track the tasks itself instead of
using an ExecutorCompletionService.