HBASE-12212 HBaseTestingUtility#waitUntilAllRegionsAssigned should wait for RegionStates

Signed-off-by: stack <stack@apache.org>
HBASE-12189 Fix new issues found by coverity static analysis

Conflicts:
	hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/QuotaState.java
	hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/UserQuotaState.java