add a mongo_path field in the maaping*.yaml file

[bertrandcedric]

In the current generated mapping file, it will be helpfull to add a mongo_path to know how mongodb object are mapped to table.

For example:

For a table that is mapped on the root object:

collection_name: projects
dbname: retail
mongo_path: .
pg_mapping:

For a table that is mapped on the sub-object:

collection_name: services_metadata
dbname: retail
mongo_path: .services.metadata
pg_mapping: