Lower-case units in generated metrics mdl file
Lower-case units in generated metrics mdl file

The mdl file will be consumed by CM. They have asked for the units
to be lower-case.

Change-Id: Iacc583ff2c1680ec02a41feab558fbb2890d95be
Reviewed-on: http://gerrit.cloudera.org:8080/499
Reviewed-by: Matthew Jacobs <df2fa7c39d141dc5dc5589fed74180e757ed6c9a@cloudera.com>
Tested-by: Internal Jenkins

ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC