Dynamically determine SSL version in unit tests
Dynamically determine SSL version in unit tests

KMIP by default tries to use PROTOCOL_TLSv1_2, but not all systems that
run the unit tests necessarily have this.

Dynamically determine the version to use.

Change-Id: Ia13841b3547332d6d5044b446b073dc2394bb8fb

openstack/barbican,openstack/barbican