Accept new style properties for debugger options. Fixes #2001

[fabioz]

No description provided.

[fabioz]

Please don't merge/review yet (it seems there are some tests breaking, so, I'll take a look at that...)

[int19h]

It looks like the failing tests are those that have to do with redirected output. This is probably because the adapter needs to tell pydevd to not do output redirection when the launcher is doing it, and it does so by tweaking "debugOptions" - but it doesn't adjust the property:

ptvsd/src/ptvsd/adapter/ide.py

Lines 182 to 186 in d9ef3dd

	if self.launcher and "RedirectOutput" in debug_options:
	# The launcher is doing output redirection, so we don't need the
	# server to do it, as well.
	arguments = dict(arguments)
	arguments["debugOptions"] = list(debug_options - {"RedirectOutput"})