Refresh Token bug fix in WebAPI Helper

[ypcode]

Q	A
Bug fix?	yes
New feature?	no
New sample?	no

What's in this Pull Request?

Fixes the condition to refresh the access token in the WebAPI Helper
The Token was refreshed only after expiration+ one hour

[ypcode]

Hello @jansenbe,
In some docs, I read the ACS access token was initial valid for 12 hours but this could vary.
In Azure AD tokens, I read it is valid for only one hour. I was wondering if it has become the same for ACS tokens (because, in the logs of my customer application, I see it continously refreshes the token and the expiry date seems to be no more than 1 hour.

That would mean this condition I fixed here is no longer relevant.
Any thoughts about it ?

[jansenbe]

Think token lifetime (is) will be configurable, so this still makes sense.