* refactor(@embark/dapps/tests/app): use function syntax
These changes don't fix the race conditions related to the test dapp's tests
but are a step in the right direction.
* refactor(@embark/dapps/tests/contracts): adjustments to get tests passing
Further refactoring is needed re: potentially duplicated or overlapping logic
in `packages/plugins/solidity-tests` and
`packages/core/utils/src/solidity/remapImports.ts`, as well in disabled test
dapp tests
* test(dapps/tests/app): temporarily disable intermittently failing tests
They are failing because of a race condition; once that race condition has been
fixed these tests should be reenabled.
* fix(@embark/solidity-tests): fix importing the library for the tests