Test/network agnostic tests

[iadmytro]

Context

Having dependency on particular testnet making regression suite very fragile and require substantial amount of work to switch to another testnet

Proposed Solution

Make regression suite network agnostic by querying db for suitable data for each test.

Important Changes Introduced

Network agnostic tests is a tradeoff, asserts performed by these tests not so rigorous as matching hardcoded snapshot.

[iadmytro]

Hoisting of getTestData addressed in b8bd71d