Adding feature repo listing to the diagnostics commands.

Change-Id: I63a22b798265f6c3e4bacff87fc6284cd94c4831
(cherry picked from commit b831911ab31f841a808dda377e4f06f2c738d150)
diff --git a/tools/package/runtime/bin/onos-diagnostics b/tools/package/runtime/bin/onos-diagnostics
index 51b3f8c..442b1fd 100755
--- a/tools/package/runtime/bin/onos-diagnostics
+++ b/tools/package/runtime/bin/onos-diagnostics
@@ -51,6 +51,7 @@
 }
 
 CLI_COMMANDS=(
+    "feature:repo-list"
     "feature:list"
     "bundle:list"
     "scr:list"