Create stubs for Enstore tape label format
Following on CTA#1265, add dummy code for the Enstore reading implementation. Real implementation to follow.
- Add empty subclasses
EnstoreReadSession
andEnstoreReadFile
- Modify
openReadFile
andopenReadSession
to check the label format. If it is Enstore format, return the Enstore classes. Otherwise, by default return CTA label format classes. - We will follow up with a full Enstore implementation.
Related to CTA#1239