Fixed ordering of ec2_url subdomains to match AWS

This fixes the invalid certificate issue caused by incorrect URL subdomain. Since Amazon's SSL/TLS certificate is for https://ec2.<REGION-URL>.amazonaws.com  and not https://<REGION-URL>.ec2.amazonaws.org (error output below).

Traceback (most recent call last):
  File "../../fec2-din.py", line 95, in <module>
    reservations = ec2_conn.get_all_instances()
  File "/Library/Python/2.7/site-packages/boto/ec2/connection.py", line 575, in get_all_instances
    max_results=max_results)
  File "/Library/Python/2.7/site-packages/boto/ec2/connection.py", line 656, in get_all_reservations
    [('item', Reservation)], verb='POST')
  File "/Library/Python/2.7/site-packages/boto/connection.py", line 1127, in get_list
    response = self.make_request(action, params, path, verb)
  File "/Library/Python/2.7/site-packages/boto/connection.py", line 1073, in make_request
    return self._mexe(http_request)
  File "/Library/Python/2.7/site-packages/boto/connection.py", line 910, in _mexe
    request.body, request.headers)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 955, in request
    self._send_request(method, url, body, headers)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 989, in _send_request
    self.endheaders(body)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 951, in endheaders
    self._send_output(message_body)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 811, in _send_output
    self.send(msg)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 773, in send
    self.connect()
  File "/Library/Python/2.7/site-packages/boto/https_connection.py", line 124, in connect
    'certificate' % hostname)
boto.https_connection.InvalidCertificateException: Host us-east-1.ec2.amazonaws.com returned an invalid certificate (remote hostname "us-east-1.ec2.amazonaws.com" does not match certificate): {'notAfter': 'Sep 17 23:59:59 2014 GMT', 'subject': ((('countryName', u'US'),), (('stateOrProvinceName', u'Washington'),), (('localityName', u'Seattle'),), (('organizationN
ame', u'Amazon.com Inc.'),), (('commonName', u'ec2.us-east-1.amazonaws.com'),))}