ISPN-3015 Add tests to cover more types of queries
ISPN-3038 jcache module pom should honor skipTests property

Add the skipTests property to the list of command line properties passed to the child build.
ISPN-3031 Forked module builds ignore log4j.configuration passed on the command line
ISPN-3034 Query should also filter out nulls when retrieving results through CacheQuery.iterator()