Revamp process handing in co.nclk.linen.node to use new Java 9 features

[tjb1982]

Currently there isn't even really a way to destroy a process. I've read here and here that Java 9 has some nice new process api changes that would help with this.

At a minimum, the node manager needs to be able to catch a ThreadInterrupted exception and kill any running processes, ensuring that they are actually killed. I'm sure there are some best practices around this.