Config: unify handling of config data after merge

expconfig.py

@@ -544,6 +544,7 @@ class ExpConfig(ConfigObj):
             if lib_config_name:
                 pre_config.merge(ConfigObj(lib_config_name))
                 split_shared_sections(pre_config)
+                list_assign(pre_config)
                 register_version(pre_config, config_versions)
 
         if setup_config_name:
@@ -582,6 +583,7 @@ class ExpConfig(ConfigObj):
             environment+'.config')
         if lib_config_name:
             pre_config.merge(ConfigObj(lib_config_name))
+            split_shared_sections(pre_config)
             list_assign(pre_config)
             register_version(pre_config, config_versions)