Fix occasional admission control test failures
Fix occasional admission control test failures

The admission control tests could occasionally fail when cancelled
queries return OK (IMPALA-1047). Until fixed, we can just treat
such queries as if there were cancelled.

Change-Id: Id9fc8e9f585e466059d4ffefb4d9ed407206ad1d
Reviewed-on: http://gerrit.ent.cloudera.com:8080/3019
Reviewed-by: Alex Behm <fe1626037acfc2dc542d2aa723a6d14f2464a20c@cloudera.com>
Tested-by: jenkins
(cherry picked from commit 2901a8a960076f2aec74cb5a1f5000953359a68f)
Reviewed-on: http://gerrit.ent.cloudera.com:8080/3025
Reviewed-by: Matthew Jacobs <df2fa7c39d141dc5dc5589fed74180e757ed6c9a@cloudera.com>

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