Add mutex lock file path to registry CLI wrapper class (#958)

Part of [Service provider auctions for web deployments](https://www.notion.so/Service-provider-auctions-for-web-deployments-104a6b22d47280dbad51d28aa3a91d75)
Follows #957

Reviewed-on: #958
Reviewed-by: ashwin <ashwin@noreply.git.vdb.to>
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Co-committed-by: Prathamesh Musale <prathamesh.musale0@gmail.com>

stack_orchestrator/deploy/webapp/registry_mutex.py

@@ -10,7 +10,7 @@ def registry_mutex():
         @wraps(func)
         def wrapper(self, *args, **kwargs):
             lock_file_path = DEFAULT_LOCK_FILE_PATH
-            if self.mutex_lock_file is not None:
+            if self.mutex_lock_file:
                 lock_file_path = self.mutex_lock_file
 
             with open(lock_file_path, 'w') as lock_file:

stack_orchestrator/deploy/webapp/util.py

@@ -114,9 +114,10 @@ def is_id(name_or_id: str):
 
 
 class LaconicRegistryClient:
-    def __init__(self, config_file, log_file=None):
+    def __init__(self, config_file, log_file=None, mutex_lock_file=None):
         self.config_file = config_file
         self.log_file = log_file
+        self.mutex_lock_file = mutex_lock_file
         self.cache = AttrDict(
             {
                 "name_or_id": {},