PG-1069 Enable processing sub-directories from a given path

[dhiguero]

Checklist

• Code compiles correctly
• Created tests which fail without the change (if possible)
• All tests passing
• Extended the README/documentation, if necessary

What does this PR do?

• Enable RDBMS load jobs to be given a directory, and load all files found in the different sub-directories recursively. The functionality is backward-compatible as it uses the same parameters but detects if it is a directory or a file.
• Improve overall operation logging
• Add a new parameter to look for a specific file extension

Where should the reviewer start?

What is missing?

How should this be manually tested?

        cmd:
          - "./rdbms"
          - "schema"
          - "load"
          - "--scriptLoadPath=/napptive/config/"
          - "-c=host=postgres port=5432 user=$(POSTGRES_USER) password=$(POSTGRES_PASSWORD) dbname=$(POSTGRES_DB)"

Any background context you want to provide?

• When executing a load job for development purposes it is more convenient to use a single trait to mount the configmaps.

What are the associated tickets?

• PG-1069

Screenshots (if appropriate)

Questions

[Carmendelope]

Good!