Only return JVM processes that are being profiled by JCoz native agent

[Byte-Lab]

In https://github.com/Decave/JCoz/blob/master/src/java/src/main/java/com/vernetperronllc/jcoz/service/JCozServiceImpl.java#L68, we build a list of the JVM processes that can be profiled by the client. We should only be adding processes that are being profiled by JCoz rather than any process. Not sure what the best way to do this is - is there some way to check whether JNI functions are registered on the VM @MattPerron ?

[Byte-Lab]

@RichardH92 This is another good starter bug that is closely related to #21. Let me know if you have any questions and/or would rather work on something else.