RocksDB: Skip 'test_memory_condition' in 'ep_testsuite'
RocksDB: Skip 'test_memory_condition' in 'ep_testsuite'

The 'test_memory_condition' requires full control on how memory is
allocated by the underlying store. We do not have that yet for RocksDB.
In particular, depending on the configuration RocksDB pre-allocates
default-size blocks of memory in the internal Arena, before any DB is
actually opened.

Change-Id: I025e32f8f7490465bda72847cfb17721f0ac0196
Reviewed-on: http://review.couchbase.org/85509
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>

daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine