#264 Execution of additional SBG workflows

[LucaCinquini]

Purpose

• The purpose of this PR is to improve the SPS functionality to execute SBG workflows.

Proposed Changes

• [ADD] The generic CWL DAG can now use job parameters from either a JSON formatted string, or a URL referencing a YAML or JSON file
• [ADD] A new DAG that is specific to collecting the input parameters for the SBG L1 to L2 end-to-end workflow
• [CHANGE] The generic docker-cwl pod is now using a fixed version of the sps-docker-cwl image

Issues

• [New Feature]: Execution of additional SBG workflows #40

Testing

• The generic cwl-dag was used to successfully execute the SBG pre-process workflow, either passing the URL of the YAML parameters file, or the same parameter values specified in a JSON formatted string
• The new sbg-l1-to-l2-e2e-cwl-dag was successfully triggered, although eventually it crashed because of the Pod disk becoming full