Add an ability to update timezone

Signed-off-by: Yevhen Fastiuk <yfastiuk@nvidia.com>

scripts/hostcfgd

@@ -1405,6 +1405,20 @@ class DeviceMetaCfg(object):
                 return
             run_cmd(['sudo', 'monit', 'reload'])
 
+    def timezone_update(self, data):
+        """
+        Apply timezone handler.
+        Run the following command in Linux: timedatectl set-timezone <timezone>
+        Args:
+            data: Read table's key's data.
+        """
+        new_timezone = data.get('timezone')
+        syslog.syslog(syslog.LOG_DEBUG, f'DeviceMetaCfg: timezone update to {new_timezone}')
+
+        #run command will print out log error in case of error (no need to raise additional exception)
+        run_cmd(f'timedatectl set-timezone {new_timezone}', True, False)
+
+
 class MgmtIfaceCfg(object):
     """
     MgmtIfaceCfg Config Daemon
@@ -1741,6 +1755,7 @@ class HostConfigDaemon:
     def device_metadata_handler(self, key, op, data):
         syslog.syslog(syslog.LOG_INFO, 'DeviceMeta handler...')
         self.devmetacfg.hostname_update(data)
+        self.devmetacfg.timezone_update(data)
 
     def syslog_handler(self, key, op, data):
         self.syslogcfg.syslog_update(data)