Make sure bad includes mark hosts as failed properly

[jimi-c]

Example:

# cat test.yml
- hosts: localhost
  gather_facts: false
  tasks:
    - include: bad.yml

# cat bad.yml
- hosts: all
  gather_facts: false
  tasks:
    - ping:

When run:

PLAY ***************************************************************************

TASK [include] *****************************************************************
included: /root/testing/cwang/ping-20.yml for localhost
 [WARNING]: ERROR! no action detected in task  The error appears to have been in '/root/testing/cwang/ping-20.yml': line 1, column 3, but may be elsewhere in the file depending on the exact
syntax problem.  The offending line appears to be:   - hosts: all   ^ here


PLAY RECAP *********************************************************************
localhost                  : ok=1    changed=0    unreachable=0    failed=0   

In the above situation, the task is not marked as failed, so it does not appear anything went wrong. This can happen any time the YAML is invalid in the included file.