DefaultFeatureType now implements FeatureType.
We had to disable the check against infinite recursivity in 'isAssignableFrom'.
The previous check was wrong anyway (we need to compare feature pairs, not only
the base feature type). We will implement a new recursivity check later.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK8@1598371 13f79535-47bb-0310-9956-ffa450edef68