This test should be improved to also test the loading of shared classes by the boot class loader
 
http://hg.openjdk.java.net/jdk/jdk/file/0d97bf7cf8a4/test/hotspot/jtreg/runtime/cds/appcds/ParallelLoadTest.java

In addition, asserts should be added to the JVM to verify that for a shared classes loaded the boot class loader, SystemDictionary::load_shared_class is not called multiple times.