Move tests to test/cbsasl

Prepare to move to memcached

Change-Id: I4b570a65e9f89309e64bf55811eeb99e0fae0b7f
Reviewed-on: http://review.couchbase.org/34624
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>