Adding tests for incr/decr in memory cache adapter.
Adding tests for incr/decr in memory cache adapter.

wbeater/lithium,m4rcsch/lithium-core-library,whowgames/lithium,whowgames/lithium,m4rcsch/lithium-core-library,davidpersson/lithium,datachand/lithium,wbeater/lithium,muyehub/lithium,davidpersson/lithium,pixelcog/lithium,UnionOfRAD/lithium,graphis/lithium,jails/lithium,muyehub/lithium,pixelcog/lithium,UnionOfRAD/lithium,graphis/lithium,datachand/lithium,jails/lithium