Fix netdata upgrade for old versions

wo/cli/plugins/stack_upgrade.py

@@ -383,6 +383,15 @@ class WOStackUpgradeController(CementBaseController):
                         "bash /var/lib/wo/tmp/kickstart.sh "
                         "--dont-wait --no-updates --stable-channel",
                         errormsg='', log=False)
+                    if (os.path.exists('/opt/netdata') and
+                            not os.path.exists(
+                                '/opt/netdata/var/run/netdata/netdata.pid')):
+                        WOShellExec.cmd_exec(
+                            self,
+                            'bash /var/lib/wo/tmp/kickstart.sh '
+                            '--dont-wait --no-updates '
+                            '--stable-channel --reinstall-even-if-unsafe',
+                            errormsg='', log=False)
                     Log.valide(self, "Upgrading Netdata")
 
                 if WOAptGet.is_selected(self, 'WordOps Dashboard', packages):