Allow filtering of testapp tests
Allow filtering of testapp tests

Allow a second parameter to memcached_testapp to be specified to
filter which tests are run. For example, running testapp as:

    ./memcached_testapp plain get

will only run tests whose name includes the string 'get'.

Change-Id: I24eff268e6f7e63bd6d48e79af3294d0980cfe3a
Reviewed-on: http://review.couchbase.org/47450
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Mark Woosey <d474fe5a1aa9b2ad090a5c5d1141e951721c8dc9@couchbase.com>
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

daverigby/memcached,mrkwse/memcached,owendCB/memcached,cloudrain21/memcached-1,daverigby/kv_engine,daverigby/memcached,couchbase/memcached,couchbase/memcached,owendCB/memcached,cloudrain21/memcached-1,owendCB/memcached,mrkwse/memcached,daverigby/kv_engine,mrkwse/memcached,couchbase/memcached,cloudrain21/memcached-1,owendCB/memcached,daverigby/kv_engine,daverigby/kv_engine,cloudrain21/memcached-1,daverigby/memcached,couchbase/memcached,mrkwse/memcached,daverigby/memcached