Add supress_warnings API, so we can quietly redefine methods in Pro/Ent

lib/sidekiq/core_ext.rb

@@ -104,3 +104,16 @@ rescue LoadError
 end
 
 
+begin
+  require 'active_support/core_ext/kernel/reporting'
+rescue LoadError
+  module Kernel
+    module_function
+    def silence_warnings
+      old_verbose, $VERBOSE = $VERBOSE, nil
+      yield
+    ensure
+      $VERBOSE = old_verbose
+    end
+  end
+end