[STORE] Added Model.create_index! and Model.refresh_index! methods (delegated to gateway)

Author: karmi

elasticsearch-persistence/lib/elasticsearch/persistence/model.rb

@@ -78,6 +78,8 @@ def gateway(&block)
                      :search,
                      :find,
                      :exists?,
+                     :create_index!,
+                     :refresh_index!,
               to: :gateway
           end
 

elasticsearch-persistence/test/integration/model/model_basic_test.rb

@@ -27,7 +27,7 @@ class ::Person
 
       context "A basic persistence model" do
         setup do
-          Person.gateway.create_index! force: true
+          Person.create_index! force: true
         end
 
         should "save the object with custom ID" do