Merge pull request #1291 from mboersma/update-pyopenssl

chore(requirements): update pyOpenSSL to v17.0.0

Author: mboersma

rootfs/requirements.txt

@@ -17,7 +17,7 @@ packaging==16.8
 pyasn1==0.2.3
 psycopg2==2.7.1
 pyldap==2.4.28
-pyOpenSSL==16.2.0
+pyOpenSSL==17.0.0
 pytz==2017.2
 requests==2.13.0
 requests-toolbelt==0.7.1