HBASE-22676 Move all the code in hbase-rsgroup to hbase-server and re…#399

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Apache9 merged 1 commit intoapache:HBASE-22514from

Apache9:HBASE-22676

Jul 23, 2019

Commits on Jul 22, 2019

HBASE-22676 Move all the code in hbase-rsgroup to hbase-server and remove hbase-rsgroup module
Apache9
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