Adds no_proxy input to create_overcloudrc workflow

When the create_overcloudrc workflow was first introduced, it did
not provide an input argument for the no_proxy argument of the
primary action it calls.  This patch adds the no_proxy input argument
to the create_overcloudrc workflow, ensures the argument is passed
to the underlying action and updates the description of the workflow
to notify users of the optional no_proxy list.

Change-Id: I6074b4085b5b77f010f5f2972e7b120aa344f6c5
fixes-bug: 1776930

workbooks/deployment.yaml

@@ -499,7 +499,8 @@ workflows:
 
   create_overcloudrc:
     description: >
-      Given the name of a container, generate the overcloudrc files
+      Given the name of a container and optionally a comma-separated string
+      of hosts that shouldn't be proxied, generate the overcloudrc files
       needed to access the overcloud via the CLI.
 
     tags:
@@ -507,6 +508,7 @@ workflows:
 
     input:
       - container: overcloud
+      - no_proxy: ''
       - queue_name: tripleo
 
     tasks:
@@ -514,6 +516,7 @@ workflows:
         action: tripleo.deployment.overcloudrc
         input:
           container: <% $.container %>
+          no_proxy: <% $.no_proxy %>
         on-complete: send_message
         publish-on-error:
           status: FAILED