Removed the convenience constructors. The original intend was to make direct instantiation of 'DefaultFoo' types easier,
for example by avoiding the need to invoke Collections.singletonMap(DefaultFoo.NAME_KEY, name) in the common case where
the user just wants to specify a name and no other properties. However experience has shown that it still not convenient
enough. We should probably provide a 'GeodeticObjectBuilder' instead.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK7@1533614 13f79535-47bb-0310-9956-ffa450edef68