MB-19948: enable disabled meta-data tests.
MB-19948: enable disabled meta-data tests.

With MB-19948 these tests no longer fail
valgrind, so can be enabled.

Change-Id: Ida628a3dd48de243703ebc282b84dc23d5a69ac6
Reviewed-on: http://review.couchbase.org/65324
Well-Formed: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Will Gardner <cbd6f5d9092d9ef7d5c0510d53bba134b22c02f2@couchbase.com>
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>

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