[NO ISSUE] Fix comment of concurrent merge policy test

- user model changes: no
- storage format changes: no
- interface changes: no

Details:
- Fix the comment of the test case using-concurrent-merge-policy.

Change-Id: I363f5739ac4bb2a9dd14df7be97372eb1e838dd6
Reviewed-on: https://asterix-gerrit.ics.uci.edu/3572
Reviewed-by: Luo Chen <cluo8@uci.edu>
Contrib: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Murtadha Hubail <mhubail@apache.org>
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/dml/using-concurrent-merge-policy/using-concurrent-merge-policy.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/dml/using-concurrent-merge-policy/using-concurrent-merge-policy.1.ddl.sqlpp
index 1093966..efcc85f 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/dml/using-concurrent-merge-policy/using-concurrent-merge-policy.1.ddl.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/dml/using-concurrent-merge-policy/using-concurrent-merge-policy.1.ddl.sqlpp
@@ -17,8 +17,7 @@
  * under the License.
  */
 /*
- * Description     : This test is intended to test the compact statement which merge the disk components of a dataset and
- * all of its indexes using the concurrent merge policy.
+ * Description     : This test is intended to test a dataset and all of its indexes using the concurrent merge policy.
  * Expected Result : Success
  * Date            : June 25 2019
  */