Get all options of slapconsole section after those from slapconsole.

Previously, cert_file and key_file could  only be set from slapconsole section
but  as it's  supposed to  already been  defined in  slapos section,  then use
slapos values first, then fallback on slapconsole section.

slapos/console.py

@@ -77,16 +77,14 @@ class Config:
     configuration_parser = ConfigParser.SafeConfigParser()
     configuration_parser.read(configuration_file_path)
     # Merges the arguments and configuration
+    for section in ('slapos', 'slapconsole'):
       try:
-      configuration_dict = dict(configuration_parser.items("slapos"))
+        configuration_dict = dict(configuration_parser.items(section))
       except ConfigParser.NoSectionError:
         pass
       else:
         for key in configuration_dict:
-        if not getattr(self, key, None):
           setattr(self, key, configuration_dict[key])
-    configuration_dict = dict(configuration_parser.items('slapos'))
-    setattr(self, 'master_url', configuration_dict['master_url'])
 
     if not self.master_url:
       raise ValueError('master_url is required.')