Remove tester ref from assert_tx_failed()

[fubuloubu]

- What I did

I noticed that assert_tx_failed() fixture required a reference to tester that could just be referenced internally, fixing some usage issues people have been having. I wanted to also get rid of needing lambda: but couldn't at this point

- How I did it

Greped for all uses in tests/ and updated setup_transaction_tests.py

- How to verify it

Check out what tests I changed
Run pytest

- Description for the changelog

Modified assert_tx_failed() to remove reference to tester as tester reference was already provided internally

- Cute Animal Picture

[jacqueswww]

I like it! One less parameter makes it even easier to use :)

[fubuloubu]

Yeah. The next step is that it should be a pytest fixture inside conftest.py, then simplifying what's going on inside setup_transaction_tests.py and making it so we don't have to import all these helpers which are basically fixtures

[DavidKnott]

LGTM