DefaultAssociationRole now implements FeatureAssociationRole.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK8@1598380 13f79535-47bb-0310-9956-ffa450edef68
DefaultOperation now implements Operation.
This complete the implementation of GeoAPI interfaces derived from ISO 19109.
The next step will be to implement GeoAPI interfaces for feature instances (as opposed to feature types).


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK8@1598383 13f79535-47bb-0310-9956-ffa450edef68