To honour the Object.equals contract.

To honour the Object.equals contract.

Changed to org.junit.Assert.

There were minimal changes:
Some tests had their own runners these were discontinued as IDEs/maven run the tests anyway.
Removed the main methods for these.
2 tests were dependent on the running order so added the test sorter.

All tests succeed on junit 4 with legacy support.

Move the test output folder 'runtests' to target or build directory so that mvn clean can clean that.

A fix for older JDK8 versions: https://bugs.openjdk.java.net/browse/JDK-8041920
This caused random failures a little time after startup. Reported now so that when we upgrade javassist for JDK9 then we would not have to fork this class.

Due to the specification change of jigsaw, ClassLoader#defineClass()
cannot be invoked through reflection API.  As a workaround,
  --add-opens java.base/java.lang=ALL-UNNAMED
must be given to the JVM.  The ant target "runtest9" adds this jvm
argument.

See #ClassFilesAsResources in JSR 376.  We don't need to hack the module system to read a class file in java.lang.

http://openjdk.java.net/projects/jigsaw/spec/issues/

create a proxy object due to access controls by jigsaw.

LoaderClassPath is modified to show the same behavior in both Java 8 and 9.

An NPE would be thrown by the constructor when called with a method
without code.
Also clarify the documentation of a few methods.