Initial (untested) setup of code to detect IBM Websphere on the
authenticator, to handle it's specific way of storing group info in the
Credentials as opposed to the JBoss/Tomcat way of storing it in
Principals.
Logging added and fixed package name of WSCredentials interface
Additional logging and short circuit checking if role is found
Caching whether we're running on websphere
Caching getMethod for websphere
Merged changes from hawtio/master
Logging added and fixed package name of WSCredentials interface
Additional logging and short circuit checking if role is found
Caching whether we're running on websphere
Caching getMethod for websphere
Merge branch 'hawtio-websphere' of
https://github.com/jfbenckhuijsen/hawtio.git into hawtio-websphere

Conflicts:
	hawtio-system/src/main/java/io/hawt/system/Authenticator.java
Merge pull request #1460 from jfbenckhuijsen/hawtio-websphere

Hawtio websphere #1456