auto_load_processed should be able to load a file processed anywhere

[patrickherring-TRI]

Is your feature request related to a problem? Please describe.
When reloading a file using auto_load_processed function, the function fails if it cannot find the validation schema file. This frequently occurs when the data is processed in the data pipeline and then opened on another machine. The reloading function goes to look for the file location of the validation schema and cannot find it.

Describe the solution you'd like
The auto_load_processed function should work in any environment. One possible solution is to change the schema attribute of the datapath class to be a dictionary containing the actual validation values instead of a file path.

Describe alternatives you've considered
Another is to force the function to use only validation schemas in the beep package (located at VALIDATION_SCHEMA_DIR), so that the path to those files is alway available.

Additional context
Add any other context about the feature request here.

[ardunn]

note to self: See related PR #523