use engine of queryutils module in validation for validation const discovery

lib/report/query_utils.rb

@@ -224,4 +224,5 @@ module Report::QueryUtils
     super
     klass.extend self
   end
+
 end

lib/report/validation.rb

@@ -1,6 +1,6 @@
 module Report::Validation
   extend ProactiveAutoloader
-  include Report::QueryUtils
+
   # autoload :Dates, 'report/validation/dates'
   # autoload :Integers, 'report/validation/integers'
   # autoload :Sql, 'report/validation/sql'
@@ -14,7 +14,7 @@ module Report::Validation
   def register_validation(val_method)
     const_name = val_method.to_s.camelize
     begin
-      val_module = Report::Validation.const_get const_name
+      val_module = engine::Validation.const_get const_name
       singleton_class.send(:include, val_module)
       val_method = "validate_" + val_method.to_s.pluralize
       if method(val_method)
@@ -44,4 +44,9 @@ module Report::Validation
     end
   end
 
+  def self.included(klass)
+    super
+    klass.send :include, Report::QueryUtils
+  end
+
 end