Move config provider to _init to decouple from app

remove app references from validators

util/config/validators/validate_ldap.py

@@ -2,17 +2,16 @@ import os
 import ldap
 import subprocess
 
-from app import app, config_provider
 from data.users import LDAP_CERT_FILENAME
 from data.users.externalldap import LDAPConnection, LDAPUsers
 from util.config.validators import BaseValidator, ConfigValidationException
-from _init import CONF_DIR
+from _init import CONF_DIR, config_provider
 
 class LDAPValidator(BaseValidator):
   name = "ldap"
 
   @classmethod
-  def validate(cls, config, user, user_password):
+  def validate(cls, config, user, user_password, app):
     """ Validates the LDAP connection. """
     if config.get('AUTHENTICATION_TYPE', 'Database') != 'LDAP':
       return