Module installer is using the wrong pythonPath

[DonJayamanne]

Replace the following code in moduleInstaller.ts to use getActiveInterpreter

            const currentInterpreter = interpreters.length > 1
                ? interpreters.filter(x => fileSystem.arePathsSame(x.path, pythonPath))[0]
                : interpreters[0];

[MikhailArkhipov]

If not urgent, I got it fixed in vsc branch, but it may take some time before I am able to integrate.

[DonJayamanne]

That's fine, if possible, please email me the fix ( i too can fix it, but easier this way, as you'll have less code merge conflicts)