Enable CTest support on ep-engine
Enable CTest support on ep-engine

Include the CTest module in ep-engine's CMakeList.txt, so the metadata
needed for CTest (and specifically running MemoryChecker tests) is
configured.

Change-Id: I1c8cfdaa6a86f8f63f65b78b4c05152fffb9676f
Reviewed-on: http://review.couchbase.org/52489
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: abhinav dangeti <d73ef2279de6577f7bf081737ee47554bbb7dc82@couchbase.com>
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

membase/ep-engine,daverigby/ep-engine,daverigby/kv_engine,teligent-ru/ep-engine,couchbase/ep-engine,membase/ep-engine,membase/ep-engine,couchbase/ep-engine,membase/ep-engine,owendCB/ep-engine,daverigby/ep-engine,couchbase/ep-engine,teligent-ru/ep-engine,daverigby/ep-engine,hisundar/ep-engine,hisundar/ep-engine,owendCB/ep-engine,owendCB/ep-engine,daverigby/ep-engine,hisundar/ep-engine,daverigby/kv_engine,couchbase/ep-engine,teligent-ru/ep-engine,hisundar/ep-engine,teligent-ru/ep-engine,daverigby/kv_engine,owendCB/ep-engine,daverigby/kv_engine