Enable metrics logging on cluster tests
Enable metrics logging on cluster tests

This enables the metric log at a rate of once a second on our cluster tests.
This may be too aggressive, but I figured we might learn something by choosing
an aggressive setting.

Change-Id: I41c31e70d182fa816656ff23b6712f34d9a00606
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/6583
Tested-by: Jean-Daniel Cryans <4bf4c125525b8623ac45dfd7774cbf531df19085@cloudera.com>
Reviewed-by: Jean-Daniel Cryans <4bf4c125525b8623ac45dfd7774cbf531df19085@cloudera.com>

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