Fix D2181 by including DumpRPC

Summary: As per title. The backport did not take into account modification that were done to our codebase.

Test Plan:

make check
test/functional/test_runner.py

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D3046