Integrate with esgf-qa for quality assurance of experiment submissions

[rbeucher]

The tool executes file-based quality control (QC) tests through the Compliance Checker, and, where applicable, performs additional dataset-level checks to test inter-file time-axis continuity and consistency in variable, coordinate and attribute definitions. Results from both file- and dataset-level checks are aggregated, summarized, and clustered for easier interpretation.

See https://github.com/ESGF/esgf-qa