Create credit memo for sales invoice

[metas-dh]

Test shall include:

• Customer Fixtures to use: (if needed)
• What to test
• Expectation for the test to be successful

http://recordit.co/4dDTiR5179

Note: you need a sales invoice for the test, fixture for that will be created by TheBestPessimist.

Todo for developer (besides coding)

• Always make sure the issue is in the correct project lane
• [x] run your test in jenkins e2e on a vanilla db
• [x] jenkins console URL / cypress dashboard URL to the successful test run (alternatively screenshot)
  • https://github.com/metasfresh/metasfresh-e2e/issues/133#issuecomment-506603843
  • https://jenkins.metasfresh.com/job/ops/job/run_e2e_tests/249/console
• [x] get it integrated into master
  • [x] https://github.com/metasfresh/metasfresh-webui-api/pull/1220
  • [x] https://github.com/metasfresh/metasfresh-e2e/pull/180 (2019-06-28 - ts)

All Flags are ticked? Congratulations, you have delivered!

Preconditions

A completed Sales Invoice is available but not yet paid.

[TheBestPessimist]

Printscreen of successful run