Removed the extraction of from and size from request body in Kaminari methods

Closes elastic#16

Author: karmi

elasticsearch-model/lib/elasticsearch/model/response/pagination.rb

@@ -45,8 +45,6 @@ def #{::Kaminari.config.page_method_name}(num=nil)
           #
           def limit_value
             case
-              when search.definition[:body] && search.definition[:body][:size]
-                search.definition[:body][:size]
               when search.definition[:size]
                 search.definition[:size]
               else
@@ -58,8 +56,6 @@ def limit_value
           #
           def offset_value
             case
-              when search.definition[:body] && search.definition[:body][:from]
-                search.definition[:body][:from]
               when search.definition[:from]
                 search.definition[:from]
               else

elasticsearch-model/test/unit/response_pagination_test.rb

@@ -74,12 +74,13 @@ def self.document_type; 'bar'; end
         assert_equal 50, @response.offset_value
       end
 
-      should "return the value from body" do
-        search    = Elasticsearch::Model::Searching::SearchRequest.new ModelClass, { query: { match_all: {} }, from: 10, size: 50 }
+      should "ignore the value from request body" do
+        search    = Elasticsearch::Model::Searching::SearchRequest.new ModelClass,
+                    { query: { match_all: {} }, from: 333, size: 999 }
         @response = Elasticsearch::Model::Response::Response.new ModelClass, search, RESPONSE
 
-        assert_equal 50, @response.limit_value
-        assert_equal 10, @response.offset_value
+        assert_equal Kaminari.config.default_per_page, @response.limit_value
+        assert_equal 0, @response.offset_value
       end
     end