## Changes
- Remove ResolveVariableReferencesInComplexVariables - it blocked
complex-within-complex for no good reason.
- Repeat regular resolution twice, it helps with a couple test cases we
have.
There may be a case for running it 3 times or more in a loop, but there
is no test case for that, so this PR is simple incremental improvement.
## Tests
Existing acceptance tests. Previously all unit tests for complex
variables were converted to acceptance tests, to capture this change and
ensure nothing breaks.
Denis Bilenko