Change detect timezone.

pym/cl_fill_install.py

@@ -638,14 +638,15 @@ class fillVars(object, glob_attr):
         """timezone for clock"""
         zoneinfodir = "/usr/share/zoneinfo/"
         localtimefile = "/etc/localtime"
+        timezonefile = "/etc/timezone"
         # try get timezone from kernel calculate param
         timezone = self.getValueFromCmdLine("calculate",2)
         if timezone and \
             path.exists(path.join(zoneinfodir,timezone)):
             return timezone
-        # get timezone from localtime symlink
-        if path.islink(localtimefile):
-            return os.readlink(localtimefile).replace(zoneinfodir,"")
+        # get timezone from /etc/timezone
+        if path.exists(timezonefile):
+            return open(timezonefile,"r").read().strip()
         return "UTC"
 
     def get_os_install_clock_type(self):