Add the ability to return a templated post back HTML
response when a call is made that contains info from trusted
dashboard host.
implements bp websso-portal
Co-Authored-By: Jose Castro Leon <jose.castro.leon@cern.ch>
Co-Authored-By: Marek Denis <marek.denis@cern.ch>
Co-Authored-By: Thai Tran <tqtran@us.ibm.com>
Change-Id: Ia5a5c9bd176ea0372c92de6d0a3587d82f2fe5d7