Improve onos-diagnostics with new multicast commands and interface command

Change-Id: I478eb589aedd6c4c4e821c2e6c308a21c1142d36
diff --git a/tools/package/runtime/bin/onos-diagnostics b/tools/package/runtime/bin/onos-diagnostics
index 76d42f8..9cccb0e 100755
--- a/tools/package/runtime/bin/onos-diagnostics
+++ b/tools/package/runtime/bin/onos-diagnostics
@@ -72,6 +72,7 @@
     "devices"
     "links"
     "hosts"
+    "interfaces"
 
     "ports -e"
     "portstats -nz"
@@ -99,6 +100,9 @@
     "sr-next-hops"
     "sr-pw-list"
     "dhcp-relay"
+
+    "mcast-host-routes"
+    "mcast-host-show"
 )
 
 # Scan arguments for user/password or other options...