Revert "Revert "Actually wait for password prompt in remote sudo execution. Totally breaks stderr debugging"

This reverts commit e16114034c.

Conflicts:

	lib/ansible/connection.py

examples/playbooks/group_commands.yml

@@ -3,6 +3,7 @@
 
 - hosts: all
   user: root
+  sudo: True
 
   tasks:
 

lib/ansible/connection.py

@@ -26,6 +26,8 @@ import re
 import shutil
 import subprocess
 import pipes
+import socket
+import random
 
 from ansible import errors
 # prevent paramiko warning noise
@@ -37,6 +39,7 @@ with warnings.catch_warnings():
 
 ################################################
 
+RANDOM_PROMPT_LEN = 32      # 32 random chars in [a-z] gives > 128 bits of entropy 
 
 
 class Connection(object):