Changed the way to instanciate the MigrationHandler to fit with the DataSource

DataSource/MySQL/migrationhandler.py

 import copy
 import pymysql
 
+from Lodel.settings import Settings
+
 import EditorialModel
 import EditorialModel.classtypes
 import EditorialModel.fieldtypes
     # @param user str : The db user
     # @param password str : The db password
     # @param db str : The db name
-    def __init__(self, host, user, passwd, db, module=pymysql, db_engine='InnoDB', foreign_keys=True, debug=False, dryrun=False, drop_if_exists=False):
+    def __init__(self, module = pymysql, conn_args = None, db_engine='InnoDB', foreign_keys=True, debug=None, dryrun=False, drop_if_exists=False):
         self._dbmodule = module
+        if conn_args is None:
+            conn_args = copy.copy(Settings.get('datasource')['default'])
+            self._dbmodule = conn_args['module']
+            del conn_args['module']
+        self.db = self._dbmodule.connect(**conn_args)
         #Connect to MySQL
-        self.db = self._dbmodule.connect(host=host, user=user, passwd=passwd, db=db)
-        self.debug = debug
+        self.debug = Settings.get('debug') if debug is None else debug
         self.dryrun = dryrun
         self.db_engine = db_engine
         self.foreign_keys = foreign_keys if db_engine == 'InnoDB' else False

install/settings.py

 name = 'LODEL2_INSTANCE_NAME'
 lodel2_lib_path = 'LODEL2_LIB_ABS_PATH'
 
+debug = False
+
 emfile = 'em.json'
 dynamic_code = 'dynleapi.py'
 

install/utils.py

 def db_init():
     from EditorialModel.backend.json_backend import EmBackendJson
     from EditorialModel.model import Model
-    mh = getattr(migrationhandler,settings.mh_classname)(**(settings.datasource['default']))
+    mh = getattr(migrationhandler,settings.mh_classname)()
     em = Model(EmBackendJson(settings.emfile))
     em.migrate_handler(mh)