Include the full path of the container in the error message

If there are multiple data directories configured, having the linux path to the full container file will help to locate the file without having to search for the file 

Check failed: _s.ok() Bad status: Corruption: Failed to load FS layout: Could not open container 26f5cbd97dfe4cb98f49bb0a6a494e8f: Invalid magic number: Expected: kuducntr, found: \000\000\020\001\030▒▒▒