Allow insecure=True to be set in swiftclient

Currently when we instantiate a swiftclient.Connection we can't pass in
the insecure keyword arg. This means environments which have self-signed
certs might have trouble talking to auth/swift. This fixes that
situation and allows SSL certs to be ignored.

Change-Id: I9663ed333e93529beba4a0736d3b9207bd4f150d
Merge "Allow insecure=True to be set in swiftclient"