Adding yum module

THis is the first of the yum module which will report yum repos and subscriptions if applicable.

Signed-off-by: Jake Hunsaker <jhunsake@redhat.com>
Handling no file in parseOutputSection()

If the filename to parse was not present we would fail previously, now we return false.

It would be very rare for this to be called without first verifying the file exists, but we still need to handle that scenario.

Signed-off-by: Jake Hunsaker <jhunsake@redhat.com>