updated release script versions

Signed-off-by: Greg Wilkins <gregw@webtide.com>

scripts/release-jetty.sh

@@ -141,7 +141,7 @@ if proceedyn "Are you sure you want to release using above? (y/N)" n; then
 
     # This is equivalent to 'mvn release:prepare'
     if proceedyn "Update project.versions for $VER_RELEASE? (Y/n)" y; then
-        mvn org.codehaus.mojo:versions-maven-plugin:2.5:set \
+        mvn org.codehaus.mojo:versions-maven-plugin:2.7:set \
             -DoldVersion="$VER_CURRENT" \
             -DnewVersion="$VER_RELEASE" \
             -DprocessAllModules=true