Changed DEFAULT_SSL_VERSION to use the latest TLS version
Changed DEFAULT_SSL_VERSION to use the latest TLS version

* Changed DEFAULT_SSL_VERSION to use the latest possible TLS version.
* Fixed a potential SSL bug caused by Python compiled with the
OPENSSL_NO_SSLv3 flag.

eandersson/amqpstorm,eandersson/amqpstorm,eandersson/amqp-storm