boto3: use https:// for secure endpoints
boto3: use https:// for secure endpoints

Signed-off-by: Casey Bodley <2544ff357e70e8520f24ff4e53fde352cbf7d2cf@redhat.com>

timuralp/s3-tests,andrewgaul/s3-tests,robbat2/s3-tests,jmunhoz/s3-tests,robbat2/s3-tests,andrewgaul/s3-tests,timuralp/s3-tests,jmunhoz/s3-tests,ceph/s3-tests,ceph/s3-tests