fix issue 3483 where model is not rendered when using sharedvars

[sidravi1]

Fix for this issue: #3483

[lucianopaz]

Thanks for the fix, @sidravi1! It looks fine but could you please add a test to test_model_graph.py that asserts that this works as expected and the issue in #3483 is correctly solved?

Another thing, please add a line at the end of the maintenance section of RELEASE-NOTES.md specifying the fix.

Finally, you will have to wait for PR #3485 to get cleaned and merged, and then please rebase the work you did here on top of pymc3/master.

[sidravi1]

Hi @lucianopaz - I modified an existing test (let me know if that is a no-no) and merged in changes from PR #3485. Let me know if you need me to do anything

[twiecki]

Some things are showing up in the diff that shouldn't, can you try rebasing?

[sidravi1]

Had to fix some of it manually but should be all set now. Files changed only has the two files that i edited in it. (Not sure why it says there is a conflicting file...)

[rpgoldman]

I tried to fix the conflict in the changelog file using the web editor. I've never used that before, and I'm not sure it worked properly.

[rpgoldman]

OK, I think I successfully fixed it up. Probably the history should be tidied by squashing out the merges, etc.

[twiecki]

Seems like the merge was unsuccessful.

Either try rebasing or starting a new branch off of master and cherry-picking the appropriate commits.