ISIS-695: updating example apps to use snapshot versions

... rather than released versions (so can test new stuff etc).
ISIS-751: updating dates in NOTICE files.
ISIS-744: convert CommandJdo to use clob ...

... for exception property.
ISIS-750: store serializedForm of event as clob.
ISIS-745: don't exclude org.apache.isis from downloaded metamodel

... because in particular, we want to see any JDO objectstore entities that are in the metamodel.
ISIS-749: less noisy logging

in AdapterManagerDefault, ResourceServlet