[Pulp-list] Log output from unittests to /tmp/pulp_unittests_only.log

[John Matthews]

I modified our logging rules for unittests so any log statements in the actual unit tests itself will be available in their own file: "/tmp/pulp_unittests_only.log".
I found it helpful to sometimes look at just the unittest output (minus any Pulp output) when something goes wrong.

/tmp/pulp_unittests.log      - output from both Pulp & Unittest logging
/tmp/pulp_unittests_only.log - only Unittest logging

If anyone wants to customize the behavior, the logging configuration file for unit tests is:  /etc/pulp/logging/unit_tests.cfg  

Below wiki page captures this information:
https://fedorahosted.org/pulp/wiki/UnitTests