Revert "Amend HBASE-12457 Regions in transition for a long time when CLOSE interleaves with a slow compaction; Test import fix"

This reverts commit f6d8cde1e4f67390a936e7bc9f8c70b65a808450.
Revert "HBASE-12457 Regions in transition for a long time when CLOSE interleaves with a slow compaction."

This reverts commit 231d3ee2adbfc32dfe4f7d7cd7a96ac33968520e.