EPEL moving to python 3.6

[jabl]

EPEL has recently introduced python36* packages, though it seems the old python34* are still kept around for compatibility. But in particular, /usr/bin/python3 is now provided by the python36 package, whereas the python34 package only provides /usr/bin/python3.4

For OpenHPC it would thus make sense to switch all the python 3 packages from 3.4 to 3.6 as well.

See https://www.mail-archive.com/[email protected]/msg06502.html