tryWith should return Try[T] instead of T

[kevin-lee]

tryWith should return Try instead of return a result or throwing an exception.

The current tryWith returns the direct result or throws an exception.

// result is what resource.doSomething() returns
// or if anything goes wrong, it may throw an exception.
val result = tryWith(someCloseable) { resource =>
  resource.doSomething()
}

It needs to use Try instead of dealing directly with an exception or the result.

// result is either Success[T] where T is the type of the value resource.doSomething() returns
// or Failure containing an exception (Throwable) if the exception was thrown.
val result = tryWith(someCloseable) { resource =>
  resource.doSomething()
}