ioprocess jenkins job changes

[Dima Kuznetsov]

Hello,

In a recent effort, we've ported ioprocess to support python3 and 
decided to drop el6 support as well. As a result, a branch was created.

I've proposed changes to ioprocess jobs that include the new branch and 
also provide python3-devel dependency where available:

https://gerrit.ovirt.org/#/c/44484/
https://gerrit.ovirt.org/#/c/44485/

Please take a look and merge when time allows.

Thanks
-- 
Dima Kuznetsov