Add provisioner to Debian packages

debian/pvc-client-provisioner.postinst

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Install client binary to /usr/bin via symlink
+ln -s /usr/share/pvc/provisioner.py /usr/bin/pvc-provisioner
+
+# Reload systemd's view of the units
+systemctl daemon-reload
+
+# Restart the daemon (or warn on first install)
+if systemctl is-active --quiet pvc-provisioner.service; then
+    systemctl restart pvc-provisioner.service
+    systemctl restart pvc-provisioner-worker.service
+else
+    echo "NOTE: The PVC client API daemon (pvc-provisioner.service) has not been started; create a config file at /etc/pvc/pvc-provisioner.yaml then start it."
+fi