Overwrite jetty.xml based on cookbook template IFF nexus version does not match 2.8.* - it seems that Nexus (version 2.8) uses a different property overwride syntax for jetty configs thatn 2.7.x. Instead of interpolating property strings (${application-host}) it delegates to a property based mechanism (<Property name="application-host"/>); Hence, we will ONLY use the embedded template if the Nexus version is 2.7.x as the jetty config in Nexus 2.8 should be usabel in place (as-is)