centralized bad password handling, fixed outputing of become method

lib/ansible/plugins/connections/__init__.py

@@ -130,5 +130,6 @@ class ConnectionBase(with_metaclass(ABCMeta, object)):
 
     def check_incorrect_password(self, output, prompt):
         incorrect_password = gettext.dgettext(self._connection_info.become_method, C.BECOME_ERROR_STRINGS[self._connection_info.become_method])
-        return output.endswith(incorrect_password)
+        if output.endswith(incorrect_password):
+            raise AnsibleError('Incorrect %s password' % self._connection_info.become_method)
 

lib/ansible/plugins/connections/ssh.py

@@ -174,9 +174,7 @@ class Connection(ConnectionBase):
             # fail early if the become password is wrong
             if self._connection_info.become and sudoable:
                 if self._connection_info.become_pass:
-                    if self.check_incorrect_password(stdout, prompt):
-                        raise AnsibleError('Incorrect %s password', self._connection_info.become_method)
-
+                    self.check_incorrect_password(stdout, prompt)
                 elif self.check_password_prompt(stdout, prompt):
                     raise AnsibleError('Missing %s password', self._connection_info.become_method)
 
@@ -333,8 +331,7 @@ class Connection(ConnectionBase):
                         raise AnsibleError('ssh connection closed waiting for privilege escalation password prompt')
                     become_errput += chunk
 
-                    if self.check_incorrect_password(become_errput, prompt):
-                        raise AnsibleError('Incorrect %s password', self._connection_info.become_method)
+                    self.check_incorrect_password(become_errput, prompt)
 
                 if p.stdout in rfd:
                     chunk = p.stdout.read()