[NFC/Unit Test] Fix passing test that should pass but also should fail

[demeritcowboy]

Overview

It should pass because the test itself seems good. But it should fail because it's comparing something that in php < 7.4 silently casts to 0 and so happens to assertEqual to 0. In php 7.4 it correctly points out that it's trying to access an array key on a variable of type int.

CRM_Case_BAO_CaseTest::testInactiveCaseRole
Notice: Trying to access array offset on value of type int ... line 107

[civibot]

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[demeritcowboy]

Thanks