Fixing #179: calling stringify_keys on the extra_attributes hash.

Improve Daniel's work and move stringify_keys to
lib/casserver/authenticators/base.rb.

lib/casserver/authenticators/base.rb

@@ -38,7 +38,7 @@ module CASServer
       end
 
       def extra_attributes
-        @extra_attributes
+        @extra_attributes.stringify_keys
       end
 
       protected

lib/casserver/server.rb

@@ -785,4 +785,4 @@ module CASServer
       end
     end
   end
-end
+end

spec/casserver/authenticators/ldap_spec.rb

@@ -50,7 +50,7 @@ describe "CASServer::Authenticators::LDAP" do
         :request => {}
       ).should == true
 
-      auth.extra_attributes.should == {:full_name => 'Test', :address => 'Test'}
+      auth.extra_attributes.should == {"full_name" => 'Test', "address" => 'Test'}
     end
 
   end