Revert "Revert "Revert "Revert "Add hostname as node ID.""""

This reverts commit 3db18cc366.

build.xml

@@ -113,6 +113,8 @@
           failonerror="true">
       <arg value="-role"/>
       <arg value="node"/>
+      <arg value="-id"/>
+      <arg value="${env.HOSTNAME}"/>
       <arg value="-hub"/>
       <arg value="http://${hub.host}:${hub.port}/grid/register"/>
       <arg value="-host"/>