Move config provider to _init to decouple from app

remove app references from validators

util/config/validators/validate_secscan.py

@@ -1,6 +1,5 @@
 import time
 
-from app import app
 from boot import setup_jwt_proxy
 from util.secscan.api import SecurityScannerAPI
 from util.config.validators import BaseValidator, ConfigValidationException
@@ -9,7 +8,7 @@ class SecurityScannerValidator(BaseValidator):
   name = "security-scanner"
 
   @classmethod
-  def validate(cls, config, user, user_password):
+  def validate(cls, config, user, user_password, app):
     """ Validates the configuration for talking to a Quay Security Scanner. """
     if not config.get('FEATURE_SECURITY_SCANNER', False):
       return