Improve the message given when a field is too long (exceeds its @MaxLength value)

The value is repeated stating it is too long. This is particularly bad for a long entry, and the value itself is probably not needed anyway.

Problem is in MaxLengthFacetAbstract.java in the return statement.

@Override
public String invalidates(final ValidityContext<? extends ValidityEvent> context) {
if (!(context instanceof ProposedHolder))

{ return null; }
final ProposedHolder proposedHolder = (ProposedHolder) context;
final ObjectAdapter proposedArgument = proposedHolder.getProposed();
if (!exceeds(proposedArgument)) { return null; }

return "Proposed value '" + proposedArgument.titleString() + "' exceeds the maximum length of " + value();
}