testsuite: verify that machineid contains two values

Signed-off-by: Jakub Filak <jfilak@redhat.com>
a-a-g-machine-id: omit trailing new-line for one-liners only

Signed-off-by: Jakub Filak <jfilak@redhat.com>
a-a-g-machine-id: do not print any error from the event handler

It is expected that dmidecode-less systems will print an error message
related to the fact that dmidecode doesn't work, hence forwarding of
STDOUT and STDERR to 'event_log' file.

Signed-off-by: Jakub Filak <jfilak@redhat.com>
sos: use all valuable plugins

This commit mirrors the state of rhel7

Signed-off-by: Jakub Filak <jfilak@redhat.com>