Fix membership resolver used in integration tests

[Shaddoll]

What changed?

• Fix membership resolver used in integration tests

Why?
The matching simulation test is failing on some API calls after this #6199 got merged.
The AddDecisionTask and PollForDecisionTask API fails due to TaskListNotOwnedByHostError

How did you test it?
Existing tests and matching simulation test

Potential risks

Release notes

Documentation Changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.94%. Comparing base (a711217) to head (a0ed810).
Report is 1 commits behind head on master.

Additional details and impacted files

see 6 files with indirect coverage changes

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[Groxx]

This makes a heck of a lot of sense and looks correct and reasonable to me, but: what was failing before? I can guess how this fixes it, but this all probably belongs in the commit message / PR description.

[Shaddoll]

This makes a heck of a lot of sense and looks correct and reasonable to me, but: what was failing before? I can guess how this fixes it, but this all probably belongs in the commit message / PR description.

The matching simulation test is failing on some API calls after this PR got merged.
The AddDecisionTask and PollForDecisionTask API fails due to TaskListNotOwnedByHostError