(7.4.z) HHH-13965 AssertionError exception is thrown by SqlFunctionMetadataBuilderContributorIllegalClassArgumentTest when executing on Eclipse OpenJ9 VM AdoptOpenJDK (v. 11.0.6)

# make gradle ignore test failures
echo -e '\ntest { ignoreFailures=true }' >> hibernate-core/hibernate-core.gradle
echo -e '\ntest { ignoreFailures=true }' >> hibernate-agroal/hibernate-agroal.gradle
echo -e '\ntest { ignoreFailures=true }' >> hibernate-c3p0/hibernate-c3p0.gradle
echo -e '\ntest { ignoreFailures=true }' >> hibernate-ehcache/hibernate-ehcache.gradle
echo -e '\ntest { ignoreFailures=true }' >> hibernate-envers/hibernate-envers.gradle
echo -e '\ntest { ignoreFailures=true }' >> hibernate-proxool/hibernate-proxool.gradle

./gradlew test -Dmaven.repo.url=http://jcenter.bintray.com -Dgradle.plugin.url=https://plugins.gradle.org/m2/ \
        -Dhibernate.show_sql=true -Dhibernate.format_sql=true --info --stacktrace -x :hibernate-core:classes \
        -x :hibernate-envers:classes -x :hibernate-ehcache:test -x :hibernate-hikaricp:test -x :hibernate-jcache:test \
        -x :hibernate-vibur:test -x :hibernate-osgi:test -x :documentation:test -x :hibernate-spatial:test \
        -x :hibernate-testing:test --project-cache-dir=/tmp --continue -g local-home

java.lang.AssertionError
	at org.junit.Assert.fail(Assert.java:86)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at org.junit.Assert.assertTrue(Assert.java:52)
	at org.hibernate.boot.spi.metadatabuildercontributor.SqlFunctionMetadataBuilderContributorIllegalClassArgumentTest.buildEntityManagerFactory(SqlFunctionMetadataBuilderContributorIllegalClassArgumentTest.java:38)
	at jdk.internal.reflect.GeneratedMethodAccessor22.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)
	at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.lang.Thread.run(Thread.java:834)...