[1] Will stop tar.gz the mock logs for all std CI jobs.

I think all will agree that the current logs.gz makes it harder to debug failures on a job and requires downloading the logs.tgz file to your computer. 

I've verified it on a VDSM check-patch job [2], and it looks good, 

If you have any thoughts or concern, please give them on the patch in Gerrit, if not I'll probably merge it on next Sunday.

[1] https://gerrit.ovirt.org/#/c/66808/

[2] http://jenkins.ovirt.org/job/vdsm_master_check-patch-el7-x86_64/2856/artifact/exported-artifacts/logs/
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