HBASE-23360 [CLI] Fix help command 'set_quota' for removing limits (#896)

Differs from original by removing Capacity Unit examples since that feature isn't on this branch.

(cherry picked from commit a553b78)
(cherry picked from commit 2a1efe0)

Author: Karthik Palanisamy

hbase-shell/src/main/ruby/shell/commands/set_quota.rb

@@ -39,9 +39,21 @@ def help
 
     hbase> set_quota TYPE => THROTTLE, USER => 'u1', LIMIT => '10req/sec'
     hbase> set_quota TYPE => THROTTLE, THROTTLE_TYPE => READ, USER => 'u1', LIMIT => '10req/sec'
+    Unthrottle number of requests:
+    hbase> set_quota TYPE => THROTTLE, THROTTLE_TYPE => REQUEST_NUMBER, USER => 'u1', LIMIT => 'NONE'
+    Unthrottle number of read requests:
+    hbase> set_quota TYPE => THROTTLE, THROTTLE_TYPE => READ_NUMBER, USER => 'u1', LIMIT => NONE
+    Unthrottle number of write requests:
+    hbase> set_quota TYPE => THROTTLE, THROTTLE_TYPE => WRITE_NUMBER, USER => 'u1', LIMIT => NONE
 
     hbase> set_quota TYPE => THROTTLE, USER => 'u1', LIMIT => '10M/sec'
     hbase> set_quota TYPE => THROTTLE, THROTTLE_TYPE => WRITE, USER => 'u1', LIMIT => '10M/sec'
+    Unthrottle data size:
+    hbase> set_quota TYPE => THROTTLE, THROTTLE_TYPE => REQUEST_SIZE, USER => 'u1', LIMIT => 'NONE'
+    Unthrottle read data size:
+    hbase> set_quota TYPE => THROTTLE, USER => 'u1', THROTTLE_TYPE => READ_SIZE, LIMIT => 'NONE'
+    Unthrottle write data size:
+    hbase> set_quota TYPE => THROTTLE, USER => 'u1', THROTTLE_TYPE => WRITE_SIZE, LIMIT => 'NONE'
 
     hbase> set_quota TYPE => THROTTLE, USER => 'u1', LIMIT => '10CU/sec'
     hbase> set_quota TYPE => THROTTLE, THROTTLE_TYPE => WRITE, USER => 'u1', LIMIT => '10CU/sec'
@@ -53,7 +65,6 @@ def help
     hbase> set_quota TYPE => THROTTLE, TABLE => 't1', LIMIT => '10M/sec'
     hbase> set_quota TYPE => THROTTLE, THROTTLE_TYPE => WRITE, TABLE => 't1', LIMIT => '10M/sec'
     hbase> set_quota TYPE => THROTTLE, USER => 'u1', LIMIT => NONE
-    hbase> set_quota TYPE => THROTTLE, THROTTLE_TYPE => WRITE, USER => 'u1', LIMIT => NONE
 
     hbase> set_quota USER => 'u1', GLOBAL_BYPASS => true
 EOF