Refactor jail so that it's more self-descriptive and easier to understand by newcomers. Also, the test coverage has been improved.
Changes requiring status-react team actions:
* Replace Parse calls with new CreateAndInitCell and ExecuteJS bindings,
* Make sure web3.isConnected is ok as its response change to boolean value.
This change moves our e2e tests into a separate package to make room for proper unit and integration tests.
This is Phase 1 described in #371.
Changes:
Makefile has separate directives to run unit/integration tests and e2e tests,
CI runs unit/integration tests first and then e2e tests,
E2e tests are in reliability order, i.e. the least reliable tests are run in the end to be sure that nothing else is broken,
Some tests are fixed or quarantined.