Add command 'reclass-vcp-list'

Shows all VM names that will be used for VCP
in the parameters.salt.control.cluster object on all nodes
diff --git a/setup.cfg b/setup.cfg
index 6fad0ba..10aad7b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -30,3 +30,4 @@
     reclass-remove-key = reclass_tools.cli:remove_key
     reclass-show-key = reclass_tools.cli:show_key
     reclass-inventory-list = reclass_tools.cli:inventory_list
+    reclass-vcp-list = reclass_tools.cli:vcp_list