fixs command dict to be sent to connection socket (#21713)

There as an invalid key in the command dict that would cause failure
using prompts.  This changes the key from response to answer which is
what is expected by network_cli

lib/ansible/modules/network/ios/ios_command.py

@@ -148,7 +148,7 @@ def parse_commands(module, warnings):
     command = ComplexList(dict(
         command=dict(key=True),
         prompt=dict(),
-        response=dict()
+        answer=dict()
     ), module)
     commands = command(module.params['commands'])
     for index, item in enumerate(commands):