You need the Sec version (not snapshot) of the Z-Wave Binding.
Make sure that the snapshot is uninstalled first and then install the Sec version.
See this post: OH2 Z-Wave refactoring and testing... and SECURITY - #6 by chris
What is displayed when you issue in the console the following:
openhab> list -s |grep Z
201 | Active | 80 | 2.1.0.201705282306 | ZWave Binding | org.openhab.binding.zwave
(this is the snapshot, not the sec version)