Fix node*attrib commands show of undefined attributes

It would unfairly call things an invalid attribute.

confluent_client/bin/nodeattrib

@@ -55,7 +55,7 @@ exitcode = 0
 nodetype="noderange"
 
 if len(args) > 1:
-    if "=" in args[1]:
+    if "=" in args[1] or options.clear:
         exitcode=client.updateattrib(session,args,nodetype, noderange, options)
     try:
         # setting user output to what the user inputs
@@ -66,7 +66,7 @@ if len(args) > 1:
             showtype = 'current'
             requestargs=args[2:]
         else:
-            showtype = 'current'
+            showtype = 'all'
             requestargs=args[1:]
     except:
         pass

confluent_client/bin/nodegroupattrib

@@ -57,6 +57,7 @@ exitcode = 0
 #Sets attributes
 
 if len(args) > 1:
+    showtype = 'all'
     exitcode=client.updateattrib(session,args,nodetype, nodegroups, options)
     try:
         # setting user output to what the user inputs