[MacPorts] #20418: Update maven2 Portfile to release 2.2.0

[MacPorts]

#20418: Update maven2 Portfile to release 2.2.0
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 Reporter:  antony.stubbs@…          |       Owner:  macports-tickets@…                   
     Type:  update                   |      Status:  new                                  
 Priority:  Normal                   |   Milestone:                                       
Component:  ports                    |     Version:  1.7.1                                
 Keywords:                           |        Port:  maven2                               
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 Update the maven2 Portfile to track the recent release of Apache Maven.
 http://maven.apache.org/release-notes.html

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Ticket URL: <http://trac.macports.org/ticket/20418>
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