Include base_object model into module structure

modules/swagger-codegen/src/main/resources/ruby/base_object.mustache

@@ -1,3 +1,4 @@
+module {{moduleName}}
   # base class containing fundamental method such as to_hash, build_from_hash and more
   class BaseObject
 
@@ -47,13 +48,11 @@ class BaseObject
           false
         end
       else # model
-      _model = Object.const_get(type).new
+        _model = {{moduleName}}.const_get(type).new
         _model.build_from_hash(value)
       end
     end
 
-
-
     # to_body is an alias to to_body (backward compatibility)
     def to_hash
       hash = {}
@@ -81,3 +80,4 @@ class BaseObject
     end
 
   end
+end

modules/swagger-codegen/src/main/resources/ruby/model.mustache

@@ -1,5 +1,3 @@
-require_relative 'base_object'
-
 module {{moduleName}}
 {{#models}}  # {{description}}
 {{#model}}  class {{classname}} < BaseObject

modules/swagger-codegen/src/main/resources/ruby/swagger_client.mustache

@@ -7,6 +7,7 @@ require '{{gemName}}/swagger/response'
 require '{{gemName}}/swagger/version'
 
 # Models
+require '{{modelPackage}}/base_object'
 {{#models}}
 {{#model}}
 require '{{importPath}}'