region: we are connecting to AWS region with is_secure=False

[smithfarm]

This is a presumably "insecure" workaround for a long timeout followed by:

(virtualenv)smithfarm@wilbur:~/src/aws/ceph-auto-aws> ho probe region
2016-04-02 21:17:25,369 INFO Loaded yaml tree from './aws.yaml'
2016-04-02 21:17:25,369 INFO Testing connectivity to AWS Region 'eu-west-1'
Traceback (most recent call last):
...
  File "/home/smithfarm/src/aws/ceph-auto-aws/virtualenv/lib/python3.4/site-packages/boto/https_connection.py", line 131, in connect
    ca_certs=self.ca_certs)
  File "/usr/lib64/python3.4/ssl.py", line 888, in wrap_socket
    ciphers=ciphers)
  File "/usr/lib64/python3.4/ssl.py", line 578, in __init__
    self.do_handshake()
  File "/usr/lib64/python3.4/ssl.py", line 805, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:598)

in the connect_to_region() call in region.py (currently seen only in Python 3)