Use built in json module and fall back to simplejson. Require python-simplejson on rhel5.

See also: https://lists.fedorahosted.org/archives/list/koji-devel@lists.fedorahosted.org/thread/HLNSZRRQNHTYCQXWE5L5WXTLA3NPHAEZ/#HLNSZRRQNHTYCQXWE5L5WXTLA3NPHAEZ

I'm surprised this hasn't been merged yet. It's rather trivial...

Wasn't in a hurry, giving folks a chance to review.

I honestly think we should drop RHEL 5 support at this time and focus on rhel 6 on. given that RHEL 5 is End of Production and EPEL will drop support on March 31 2017. Signed repos will not work on RHEL 5. we can ensure that the current version for rhel5 continues to work with new hub versions.

ausil, not ready to do that quite yet, but maybe soon we can relegate rhel5 support to a separate branch (which I think we'll have to do for py3). However, that's all a bit beyond of the scope of this simple change. Are you objecting?

+1

Commit 7c0df57e fixes this pull-request