Increase timeout in test_rows_availability to make sure query state is what we expect.

Change-Id: Id4feebcc7b7cecb07555009219e6420e48a0c82b
Reviewed-on: http://gerrit.ent.cloudera.com:8080/3534
Tested-by: jenkins
Reviewed-by: Nong Li <nong@cloudera.com>
Reviewed-on: http://gerrit.ent.cloudera.com:8080/3579