system-info: refactor func_name to prevent refactor

rhodecode/lib/system_info.py

@@ -129,7 +129,7 b' class SysInfoRes(object):'
 class SysInfo(object):
 
     def __init__(self, func_name, **kwargs):
-        self.func_name = func_name
+        self.function_name = func_name
         self.value = _NA
         self.state = None
         self.kwargs = kwargs or {}
@@ -140,14 +140,14 b' class SysInfo(object):'
             raise ValueError(
                 'computed value for {} is not instance of '
                 '{}, got {} instead'.format(
-                    self.func_name, SysInfoRes, type(computed)))
+                    self.function_name, SysInfoRes, type(computed)))
         return computed.__json__()
 
     def __str__(self):
-        return '<SysInfo({})>'.format(self.func_name)
+        return '<SysInfo({})>'.format(self.function_name)
 
     def compute(self, **kwargs):
-        return self.func_name(**kwargs)
+        return self.function_name(**kwargs)
 
 
 # SysInfo functions