rename expectLog to expectLogContains

[hlimbo]

• requesting to rename expectLog function to expectLogContains for better readability
• removed extra parameter condition not being actively used

[ghost]

DeepCode's analysis on #79d741 found:

• ❌ 0 critical issues. ⚠️ 0 warnings and 0 minor issues. ✔️ 0 issues were fixed.

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[coveralls]

Coverage increased (+0.05%) to 95.003% when pulling 79d741e on hlimbo:test/test_utils into c70aedf on Unity-Technologies:master.