[HBASE-21713] Support set region server throttle quota - ASF JIRA

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Support set region server rpc throttle quota which represents the read/write ability of region servers and throttles when region server's total requests exceeding the limit.

Use the following shell command to set RS quota:
set_quota TYPE => THROTTLE, REGIONSERVER => 'all', THROTTLE_TYPE => WRITE, LIMIT => '20000req/sec'
set_quota TYPE => THROTTLE, REGIONSERVER => 'all', LIMIT => NONE
"all" represents the throttle quota of all region servers and setting specified region server quota isn't supported currently.

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Support set region server rpc throttle quota which represents the read/write ability of region servers and throttles when region server's total requests exceeding the limit. Use the following shell command to set RS quota: set_quota TYPE => THROTTLE, REGIONSERVER => 'all', THROTTLE_TYPE => WRITE, LIMIT => '20000req/sec' set_quota TYPE => THROTTLE, REGIONSERVER => 'all', LIMIT => NONE "all" represents the throttle quota of all region servers and setting specified region server quota isn't supported currently.

Support set region server throttle quota which represents the read/write ability of region servers.

Use the following command to set RS quota:
set_quota TYPE => THROTTLE, REGIONSERVER => 'all', THROTTLE_TYPE => WRITE, LIMIT => '20000req/sec'

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