PRODMGT-547 - added a new attribute 'EndpointRegEx' to <ServiceProvider/> tag to allow...

for PRODMGT-547 we introduced a new attribute:

EndpointRegEx
eg:

` <ServiceProvider EndpointRegEx="^http://services\.testcorptwo\.org.*"
   TokenType="http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.1#SAMLV2.0" 
   TruststoreAlias="service2"/>`


this allows to sue regular expressions as endpoints.