CAS: First implementation

Conflicts:
	apis-authorization-server-war/src/test/resources/apis.application.properties
	pom.xml
CAS: add logout filter
CAS: Spring configuration

Conflicts:
	apis-authorization-server-war/src/test/resources/apis.application.properties
Merge pull request #55 from raymondBourges/cas

Seems in line with development until now, thank you!