expr: clean from direct use zipper/limiter from carbonapi app global config

[msaf1980]

Try to refactor expr package for avoid direct usage zipper/limiter from carbonapi app global config.
Not a complete refactor, no separate Eval/Fetch (may be in future).

[msaf1980]

Reason for do this - use expr methods in separate product. Use for configure it with carbonapi app config is bad design.

[msaf1980]

@npazosmendez Another variant of expr refactor. It's compromise (global evaluator exist, but only in expr). May be less clear, but more simple and no Do changes is required.

[msaf1980]

Not complete solution. #818 solved more problems, but required functions Do signature change

There's other cases that are even more tricky, or maybe even impossible. For example aliasQuery