Fix parallelism bug in exit processing (#1110)

* Fix parallelism bug in exit processing

Also:

* Remove parallelism for all other operations except deposit merkle proofs
* Improve exit tests
* Fix broken attestation test

Closes #1090

* Allow for generating block/pre/post states from some unit tests (#1123)

* Add post-state checks, comments

* Add state_transition_vectors crate

* Integrate new testing crate with CI

* Add readme

* Add additional valid tests

* Remove ExitTests (they were moved to new crate)

* Small test fixes

* Delete incorrect saturating_sub in slash_validator

And clean-up the balance increase/decrease functions to look more like the spec.

Co-authored-by: Paul Hauner <paul@paulhauner.com>

.github/workflows/test-suite.yml

@@ -33,6 +33,15 @@ jobs:
       run: sudo npm install -g ganache-cli
     - name: Run tests in debug
       run: make test-debug
+  state-transition-vectors-ubuntu:
+    runs-on: ubuntu-latest
+    needs: cargo-fmt
+    steps:
+    - uses: actions/checkout@v1
+    - name: Get latest version of stable Rust
+      run: rustup update stable
+    - name: Run state_transition_vectors in release.
+      run: make run-state-transition-tests
   ef-tests-ubuntu:
     runs-on: ubuntu-latest
     needs: cargo-fmt