lib: Consolidate VIEW_NODE to be ENABLE_NODE as well

If you are in VIEW_NODE, the command should exist in ENABLE_NODE
as well.  This is being done to reduce chances of code being
added to one but not the other NODE.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
diff --git a/lib/command.c b/lib/command.c
index 8089360..3088593 100644
--- a/lib/command.c
+++ b/lib/command.c
@@ -622,6 +622,9 @@
   vector_set (cnode->cmd_vector, cmd);
   if (cmd->tokens == NULL)
     cmd->tokens = cmd_parse_format(cmd->string, cmd->doc);
+
+  if (ntype == VIEW_NODE)
+    install_element (ENABLE_NODE, cmd);
 }
 
 static const unsigned char itoa64[] =