Adding ACLs for requiring admin or viewer role to different ONOS CLI commands.

Change-Id: Iba1744b7a76449eab54406cc89f65c1c0d48e393
diff --git a/tools/package/etc/users.properties b/tools/package/etc/users.properties
index c7bdb2d..95a97bc 100644
--- a/tools/package/etc/users.properties
+++ b/tools/package/etc/users.properties
@@ -31,4 +31,7 @@
 #
 karaf = karaf,_g_:admingroup
 onos = rocks,_g_:admingroup
+guest = guest,_g_:guestgroup
 _g_\:admingroup = group,admin,manager,viewer,webconsole
+_g_\:guestgroup = group,viewer
+