Describe the bug

When testing exporting/importing in integration testing, the system properties need to be cleared so that they don't interfere with follow-up tests in the same JVM.

Version

999-SNAPSHOT

Expected behavior

All tests that call TestingExportImportResource should eventually call clear() to remove those properties.

Actual behavior

In some place this has been forgotten, and it is also missing try/finally wrapper.

How to Reproduce?

ClientPoliciesImportExportTest.testSingleFileRealmExportImport

Anything else?

No response