Add support for jvm 17 thread mechanism

[shakhar]

I tried to use junit4git with junit5 on my jvm 17 project and it seems the the classpath context of my application doesn't pass to the agent's thread and I am getting many of the following error:

ERROR org.walkmod.junit4git.core.bytecode.AgentClassTransformer - Error instrumenting ${myAppClass}
javassist.NotFoundException: ${myAppClass}
	at javassist.ClassPool.get(ClassPool.java:430)
	at org.walkmod.junit4git.javassist.JavassistUtils.instrumentClassWithStaticStmt(JavassistUtils.java:72)
	at org.walkmod.junit4git.core.bytecode.AgentClassTransformer.instrumentClass(AgentClassTransformer.java:95)
	at org.walkmod.junit4git.core.bytecode.AgentClassTransformer.transform(AgentClassTransformer.java:78)
	at java.instrument/java.lang.instrument.ClassFileTransformer.transform(ClassFileTransformer.java:244)
	at java.instrument/sun.instrument.TransformerManager.transform(TransformerManager.java:188)
	at java.instrument/sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:541)
	at java.base/java.lang.ClassLoader.defineClass1(Native Method)
	at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1012)
	at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150)
	at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:862)
	at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:760)
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:681)
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:639)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)