Upgrade wagon-ssh to 3.4.0

Change-Id: Id9a1bf7fcdba7c011ccff54188dfb1bef8bf8a4b
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

pom.xml

@@ -346,7 +346,7 @@
             <dependency><!-- add support for ssh/scp -->
               <groupId>org.apache.maven.wagon</groupId>
               <artifactId>wagon-ssh</artifactId>
-              <version>3.3.4</version>
+              <version>3.4.0</version>
             </dependency>
           </dependencies>
         </plugin>