[AF Wallet] Use different specifics ids in integration tests

This CL fixes an omission in integration tests for autofill wallet that
different credit cards / addresses served by the server still had same
ids in the specifics.

This in particular fixes a test failure for CL 1236693.

Bug: 853688
Change-Id: Iecb050ceb56f709004b16f6712196b71d0be56b0
Reviewed-on: https://chromium-review.googlesource.com/1238536
Commit-Queue: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Reviewed-by: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593161}
1 file changed