External Provider Integration Template App - AKV and file renames - one more fix

Author: DaniBunny

samples/features/sql-big-data-cluster/security/encryption-at-rest-external-key-provider/kms_plugin_app/app.py

@@ -8,7 +8,7 @@
 from constants import ConfigurationConstants, Operations
 import utils
 from json_objects import EncryptDecryptRequest
-import custom
+import custom_softhsm
 
 def handler(operation, payload, pin, key_attributes, version):
     """