SRI - Fix errors in e2e tests

[skosito]

Overview

Running e2e tests has 2 problems:

1. error message even though tests pass
   Failed execution of transaction with id <uuid>. Error: NotImplementedException: Not Implemented

2. hangs after execution, currently fixed with --forceExit

Acceptance

1. Error message should not appear during e2e tests execution
2. Ideally we should not use --forceExit flag, check if possible to somehow fix jest hanging.

[ognjenkurtic]

@biscuitdey could you please open the remaining issues that are necessary to make the e2e test green?