[security-dev] PicketLink v3 Source License Headers changed to ASLv2

[Anil Saldhana]

Hi All,
   as you know, PicketLink has approval for a license change to ASLv2.  
Toward this, I have changed the license headers in the source files to 
ASLv2.

The official license header is:
============
/*
  * JBoss, Home of Professional Open Source
  *
  * Copyright 2013 Red Hat, Inc. and/or its affiliates.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
=============

I may have missed a few files. Please do inform me about the files 
missed or you are welcome to send a PR. :)

Regards,
Anil