Improve and Un-skip Rename Integration tests

[ryanbrandenburg]

They currently fail with a couple of problems. Some of those issues are on the WebTools/Platform end (https://devdiv.visualstudio.com/DevDiv/_git/WebTools/pullrequest/444996, https://devdiv.visualstudio.com/DevDiv/_git/WebTools/pullrequest/444453 and https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1715306/) once those are resolved and merged we should re-visit.

[DoctorKrolic]

@davidwengier Are the underlying problems resolved here? I keep revisiting this issue from time to time since I still want to add integration tests for renaming component's type parameter as I mentioned in #8909 (serious dedication, isn't it). I remember you did Tuesday endpoint cleanup days, maybe it's a good idea to have "Tuesday cleanup and reenable integration tests day" this week then)

[davidwengier]

I don't honestly know. You are welcome to put up a PR with a new test, or with the existing tests unskipped, and see whether the CI is green. There have been lots of changes since they were disabled, but I can't say whether they will have worked around any issues, and I'm on my phone so can't check the internal MS links.