[QA] fix mininode CAddress ser/deser

Summary:
Optionally add time to CAddress serialization/deserialization.

Partial backport of core PR10387 (commit 158e1a6)

Depends on D2388

Test Plan:

./test/functional/test_runner.py

Reviewers: #bitcoin_abc, deadalnix, jasonbcox

Reviewed By: #bitcoin_abc, jasonbcox

Subscribers: teamcity, schancel

Differential Revision: https://reviews.bitcoinabc.org/D2389