Replaced calls to DecodeDestination(str) with DecodeDestination(str,config) where config was already available in local scope

Summary: Replace direct calls of Params() with Config.GetChainParams() Refs T170

Test Plan:
make check
./test/functional/test_runner.py --extended

Reviewers: jasonbcox, O1 Bitcoin ABC, #bitcoin_abc, deadalnix, schancel

Reviewed By: jasonbcox, O1 Bitcoin ABC, #bitcoin_abc, deadalnix, schancel

Subscribers: schancel, deadalnix, teamcity

Maniphest Tasks: T170

Differential Revision: https://reviews.bitcoinabc.org/D1073