Fix the previous cset: use a proper disabled.def syntax

Author: spetrunia

storage/rocksdb/mysql-test/rocksdb/t/disabled.def

@@ -21,6 +21,6 @@ gap_lock_raise_error: MDEV-11735: MyRocks: Gap Lock detector support
 # The objection is that MTR tests are deterministic and can be run in 
 # a constrained environment.
 #
-rqg_examples
-rqg_runtime
-rqg_transactions
+rqg_examples : Test that use RQG are disabled
+rqg_runtime : Test that use RQG are disabled
+rqg_transactions : Test that use RQG are disabled