I uninstalled the Z-Wave binding (from the 2.5.0 snapshot), then downloaded the latest successfully built Z-Wave binding JAR file to /usr/share/openhab2/addons.
Upon restarting OpenHAB2 I saw the following error message:
org.osgi.framework.BundleException: Could not resolve module: org.openhab.binding.zwave [201]
Unresolved requirement: Import-Package: gnu.io
It’s apparently due to the absence of a now required feature: openhab-transport-serial.
openhab> bundle:list | grep -i zwave
250 │ Installed │ 80 │ 2.5.0.201904070025 │ ZWave Binding
openhab> bundle:list | grep serial
openhab> feature:install openhab-transport-serial
openhab> bundle:list | grep serial
251 │ Active │ 80 │ 3.14.0 │ nrjavaserial
252 │ Active │ 80 │ 3.15.0.OH2 │ nrjavaserial
openhab> logout
Works like a charm!