AIRAVATA-3420 Only load MFTUserStorageProvider if dependencies are al…

…so available

airavata_django_portal_sdk/user_storage/backends/__init__.py

@@ -1,4 +1,9 @@
 from .django_filesystem_provider import DjangoFileSystemProvider
-from .mft_provider import MFTUserStorageProvider
+try:
+    # Try to import MFTUserStorageProvider, but dependencies may not be loaded
+    # so the following might fail
+    from .mft_provider import MFTUserStorageProvider
+except Exception:
+    pass
 
 __all__ = ['DjangoFileSystemProvider', 'MFTUserStorageProvider']