TestControlledRTReopenThread.testCRTReopen relies on wall clock time [LUCENE-5737]

I'm disabling this test for now; I think to fix it we need to be able to make the timer pluggable in this class, and mock a more "controllable" wall clock for the test.

---
Migrated from [LUCENE-5737](https://issues.apache.org/jira/browse/LUCENE-5737) by Michael McCandless (@mikemccand), updated Feb 22 2018

Start with TestControlledRTReopenThread.testCRTReopen and inspect the class under test to find where wall-clock timing is used. Determine how the timer can be controlled for this test; done means the test can be re-enabled and passes reliably without depending on real elapsed time.

Written by the indexing model from the issue text.