P3.6 items equal

[antgonza]

In this PR:

• re-add line so matplotlib works fine
• self.assertItemsEqual -> self.assertCountEqual
• fix all qiita_core
• fix all processing_job

Note that the biggest differences in networkx versions are:

• before when calling edges/nodes/etc it used to return a dict and now returns a tuple
• all the lists are of the type vs. just a list, for example: nodes, returns NodeView(()) vs []

[charles-cowart]

52 files is a lot, but most of the changes are straightforward enough (method name change, slight parameter syntax change, etc.). There is one line where I'd like your comment, just to know what it's doing, and to confirm that it should still be there.

[antgonza]

Thanks for review, I have addressed your comments ...