Fix node ranges in the test framework.
Fix test reference
Code format, comments for better readability
Meta DEx testplan: continue with tests involving indivisible units

Added:

- test invalid subaction values with raw transactions
- create new offers with indivisible amounts
- match offers with indivisible amounts at same unit price

Covers test plan until row 113.

Tests passed with Master Core,
Commit: 4ff017f95e2a6d419d47e2fbd06d55b2fea47e35

Test log:
https://gist.githubusercontent.com/dexX7/ff5eeeb4a32717896ea8/raw/