Bug#846845: A New Option for Prefixing usj-name with Group ID

[Emmanuel Bourg]

This looks rather redundant with --usj-name to me. Renaming the usj jar
isn't rare but it isn't very common either.

I suggest supporting variables for --usj-name instead, prefixing the
name of the jar with the groupId would look like this:

    --usj-name=${groupId}-foo

or:

    --usj-name=${groupId}.${artifactId}

Emmanuel Bourg