Upgrade to Atomix 3.0.0-rc7 to use agent distribution

Change-Id: I368ea95456553518bd627b1f4197442535186158
diff --git a/tools/test/bin/atomix-install b/tools/test/bin/atomix-install
index 2a361b1..6627c98 100755
--- a/tools/test/bin/atomix-install
+++ b/tools/test/bin/atomix-install
@@ -44,10 +44,11 @@
 remote=$ONOS_USER@$node
 
 ssh -tt $remote "
-    [ -f $ATOMIX_INSTALL_DIR/atomix-agent.jar ] && echo \"Atomix is already installed\" && exit 1
+    [ -f $ATOMIX_INSTALL_DIR/bin/atomix-agent ] && echo \"Atomix is already installed\" && exit 1
 
     sudo mkdir -p $ATOMIX_INSTALL_DIR && sudo chown ${ONOS_USER}:${ONOS_GROUP} $ATOMIX_INSTALL_DIR
-    sudo wget -O $ATOMIX_INSTALL_DIR/atomix-agent.jar https://oss.sonatype.org/content/repositories/releases/io/atomix/atomix-agent/3.0.0-rc4/atomix-agent-3.0.0-rc4-shaded.jar
+    sudo wget -O $ATOMIX_INSTALL_DIR/atomix-dist.tar.gz https://oss.sonatype.org/content/repositories/releases/io/atomix/atomix-dist/3.0.0-rc7/atomix-dist-3.0.0-rc7.tar.gz
+    tar -xvf $ATOMIX_INSTALL_DIR/atomix-dist.tar.gz -C $ATOMIX_INSTALL_DIR
 "
 
 # Configure the ONOS installation