[Fix 1.0.4] Adding utils as a submodule (#622)

Author: Hazhzeng

setup.py

@@ -271,7 +271,8 @@ def run(self):
               'azure_functions_worker.protos',
               'azure_functions_worker.protos.identity',
               'azure_functions_worker.protos.shared',
-              'azure_functions_worker.bindings'],
+              'azure_functions_worker.bindings',
+              'azure_functions_worker.utils'],
     install_requires=[
         'grpcio==1.26.0',
         'grpcio-tools==1.26.0',