70d236cb8d
When TestLoggerFactory is initialized in tests it checks that variable
and it it's not present uses classpath to search for logger configuration.
If this search is unsuccessful a lot of exceptions are written to log:
java.lang.RuntimeException: Could not find installation home path. Please make sure bin/idea.properties is present in the installation directory.
at com.intellij.openapi.application.PathManager.getHomePath(PathManager.java:96)
at com.intellij.testFramework.TestLoggerFactory.reconfigure(TestLoggerFactory.java:67)