Replace usage of scala.util.control.NonFatal

[alexandru]

Scala's NonFatal implementation allows for certain problematic exceptions to fall through, like ControlThrowable or InterruptedException.

Not catching such exceptions ends up interfering with resource handling. We need a NonFatal implementation that only catches VirtualMachineError. These errors are:

• InternalError
• OutOfMemoryError
• StackOverflowError

This is because our aim is to not catch errors that should definitely crash the virtual machine, but for the others we need the declared finalizers to run.