Change fill methods os_install_linux_system.

Replace methods for using calculate-lib.

pym/cl_fill_install.py

@@ -485,18 +485,8 @@ class fillVars(object, glob_attr):
 
     def get_os_install_linux_system(self):
         """Get linux system (server or desktop)"""
-        mapNameSystem = {'CDS':'server',
-                         'CLD':'desktop',
-                         'CLDG':'desktop',
-                         'CLDX':'desktop',
-                         'CLS':'desktop',
-                         'CSS':'server'
-                        }
         shortName = self.Get('os_install_linux_shortname')
-        if shortName in mapNameSystem:
-            return mapNameSystem[shortName]
-        else:
-            return ""
+        return self.dictNameSystem.get(shortName,"")
 
     def get_os_install_kernel_scheduler(self):
         """Get scheduler for install root device"""