Small bugfixes in leobject and validator

- Replaced a self. by cls. in leobject
- Changed default value for runtest option

lodel/leapi/leobject.py

     @classmethod
     def get(cls, query_filters, field_list=None, order=None, group=None, limit=None, offset=0):
         if field_list is None:
-            field_list = self.fieldnames(True)
+            field_list = cls.fieldnames(True)
         else:
             for uid in [ uidname
                 for uidname in cls.uid_fieldname()

lodel/settings/validator.py

                         SettingValidator('strip')),
         'lib_path': (   None,
                         SettingValidator('path')),
-        'runtest': (    True,
+        'runtest': (    False,
                         SettingValidator('bool')),
     },
     'lodel2.logging.*' : {