LUCENE-3993: Polishing annoyances from JUnit4
LUCENE-3993: Polishing annoyances from JUnit4

- print @Ignore/@Assumption cause.
- perturb randomness in static contexts (LUCENE-3995).
- intellij idea (in)compatibilities.

git-svn-id: 308d55f399f3bd9aa0560a10e81a003040006c48@1327554 13f79535-47bb-0310-9956-ffa450edef68

cscorley/solr-only-mirror,cscorley/solr-only-mirror,cscorley/solr-only-mirror