PREFERRED_VERSION_python-pika = "0.10.0%"
PREFERRED_VERSION_python-keyring = "5.3"
PREFERRED_VERSION_python-barbican = "8.0.%"
-PREFERRED_VERSION_python-keystone = "15.0.%"
+PREFERRED_VERSION_python-keystone = "16.0.%"
PREFERRED_VERSION_python-flask = "1.0.2"
PREFERRED_VERSION_python-keystonemiddleware = "5.1.%"
PREFERRED_VERSION_python-oslo.cache= "1.26.%"