Refactor/update last changes to make hardware-wallet tests working.

**Feature description**

Refactor tests

**Is your feature request related to a problem? Please describe.**
Hardware-wallet tests are [not working](https://github.com/skycoin/hardware-wallet/runs/216895380).

**Describe the solution you'd like**
Just move the remaining tests to a TODO issue.

**Additional context**
https://github.com/skycoin/hardware-wallet/issues/84