HBASE-19467 rsgroups shell commands don't properly display elapsed time

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

@@ -32,11 +32,12 @@ EOF
       end
 
       def command(group_name)
+        now = Time.now
         formatter.header(['GROUP INFORMATION'])
         rsgroup_admin.get_rsgroup(group_name) do |s|
           formatter.row([s])
         end
-        formatter.footer()
+        formatter.footer(now, 1)
       end
     end
   end

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

@@ -30,9 +30,10 @@ EOF
       end
 
       def command(server)
+        now = Time.now
         group_name = rsgroup_admin.get_rsgroup_of_server(server).getName
         formatter.row([group_name])
-        formatter.footer(1)
+        formatter.footer(now, 1)
       end
     end
   end

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

@@ -30,10 +30,11 @@ EOF
       end
 
       def command(table)
+        now = Time.now
         group_name =
             rsgroup_admin.get_rsgroup_of_table(table).getName
         formatter.row([group_name])
-        formatter.footer(1)
+        formatter.footer(now, 1)
       end
     end
   end

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

@@ -34,6 +34,7 @@ EOF
       end
 
       def command(regex = '.*')
+        now = Time.now
         formatter.header(['GROUPS'])
 
         regex = /#{regex}/ unless regex.is_a?(Regexp)
@@ -42,7 +43,7 @@ EOF
           formatter.row([group])
         end
 
-        formatter.footer(list.size)
+        formatter.footer(now, list.size)
       end
     end
   end