GAIAPLAT-1195 : Phase 1

[JackAtGaia]

https://gaiaplatform.atlassian.net/browse/GAIAPLAT-1195

This ticket is to separate out the base framework from the workload. Basically, untangle the "mink" workload from the "framework" and make each one standalone.

Phase 1 is to logically separate the framework. Phase 2 will be to move the "mink" workload to its own directory and have it be referenced generically from the framework.

Highlights:

• all suites moved into the "suite-definitions" directory
• all python functions prefaced with "__" where having that function be public was not necessary
• summarize_results.py renamed to summarize_suite_results.py
• test related portions of summarize_results.py removed and placed in summarize_test_results.py
• adding workload.properties file to specify what should be aggregated in the summary.json and to specify what should be shown for performance tests in the stats output

[simone-gaia]

LGTM, nit: can you change the title to reflect what this PR is about ("Separate out workloads from base framework.")

[simone-gaia]

Can you print a message if the assert fails suggesting what is wrong?