Add -p to nodegroupattrib

Also modify the man pages to reflect the updates.

confluent_client/bin/nodegroupattrib

@@ -47,6 +47,8 @@ argparser.add_option('-e', '--environment', action='store_true',
                           'same name')
 argparser.add_option('-c', '--clear', action='store_true',
                      help='Clear variables')
+argparser.add_option('-p', '--prompt', action='store_true',
+                     help='Prompt for attribute values interactively')
 (options, args) = argparser.parse_args()
 
 
@@ -72,7 +74,19 @@ if len(args) > 1:
         print("Can not clear and set at the same time!")
         argparser.print_help()
         sys.exit(1)
-    exitcode=client.updateattrib(session,args,nodetype, nodegroups, options)
+    argassign = None
+    if options.prompt:
+        argassign = {}
+        for arg in args[1:]:
+            oneval = 1
+            twoval = 2
+            while oneval != twoval:
+                oneval = getpass('Enter value for {0}: '.format(arg))
+                twoval = getpass('Confirm value for {0}: '.format(arg))
+                if oneval != twoval:
+                    print('Values did not match.')
+            argassign[arg] = twoval
+    exitcode=client.updateattrib(session,args,nodetype, nodegroups, options, argassign)
     try:
         # setting user output to what the user inputs
         if args[1] == 'all':

confluent_client/doc/man/nodeattrib.ronn

@@ -7,6 +7,7 @@ nodeattrib(8) -- List or change confluent nodes attributes
 `nodeattrib <noderange> [<nodeattribute1=value1> <nodeattribute2=value2> ...]`  
 `nodeattrib -c <noderange> <nodeattribute1> <nodeattribute2> ...`  
 `nodeattrib -e <noderange> <nodeattribute1> <nodeattribute2> ...`  
+`nodeattrib -p <noderange> <nodeattribute1> <nodeattribute2> ...`  
 
 ## DESCRIPTION
 
@@ -40,6 +41,8 @@ See nodegroupattrib(8) command on how to manage attributes on a group level.
   Clear specified nodeattributes
 * `-e`, `--environment`:
   Set specified attributes based on exported environment variable of matching name.  Environment variable names may be lower case or all upper case.  Replace . with _ as needed (e.g. info.note may be specified as either $info_note or $INFO_NOTE
+* `-p`, `--prompt`:
+  Request interactive prompting to provide values rather than the command line or environment variables.
 
 ## EXAMPLES
 * Listing matching nodes of a simple noderange:

confluent_client/doc/man/nodegroupattrib.ronn

@@ -7,6 +7,7 @@ nodegroupattrib(8) -- List or change confluent nodegroup attributes
 `nodegroupattrib <group> [<nodeattribute>...]`  
 `nodegroupattrib <group> [<nodeattribute1=value1> <nodeattribute2=value2> ...]`  
 `nodegroupattrib <group> [-c] [<nodeattribute1> <nodeattribute2=value2> ...]`  
+`nodeattrib -p <noderange> <nodeattribute1> <nodeattribute2> ...`  
 
 ## DESCRIPTION