[MNG-212] finish assemble plugin

[jira-importer]

Brett Porter opened MNG-212 and commented

based on previous dist plugin and what openejb use.

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No further details from MNG-212

[jira-importer]

Brett Porter commented

still requires:

• default descriptor templates without need to specify one
• inclusion of (selected) dependencies (list explicity, include all, include all in scope)