Upgrade to Atomix 3.0.0-rc7 to use agent distribution

Change-Id: I368ea95456553518bd627b1f4197442535186158
diff --git a/tools/test/bin/atomix-uninstall b/tools/test/bin/atomix-uninstall
index c1ca86d..eb42d95 100755
--- a/tools/test/bin/atomix-uninstall
+++ b/tools/test/bin/atomix-uninstall
@@ -27,7 +27,7 @@
 remote=$ONOS_USER@${1:-$OCI}
 
 ssh -tt $remote "
-    pid=\$(ps -ef | grep atomix-agent.jar | grep -v grep | cut -c10-15 | tr -d ' ')
+    pid=\$(ps -ef | grep atomix | grep -v grep | cut -c10-15 | tr -d ' ')
     if [ -n \"\$pid\" ]; then
         echo \"Killing Atomix process \$pid on \$(hostname)...\"
         kill -9 \$pid