fix: Fix Redirect issue in latest BAS on CF

[FrankEssenberger]

Relates to #1037 and changes the logic that first the call is made against the URL with a / in the end.

[jjtang1985]

Looks good.
With slash and without slashes are different URLs. Different service might treat them differently like:

• treat them with the same behaviour by redirecting from one to another
• treat them completely different with different behaviour

So far, all the issues come from on-promise system that we want to fix, which might not behave the same as the cloud services or other OData Services.
Therefore, we either try A then switch to B like this PR, or make a new option for the generator, so that every service can map to it's csrf token url.

I guess this is a quick win. If there are some complaints about the performance due to the additional requests, we might switch to the mapping.

[FrankEssenberger]

@jjtang1985 I checked the cloud system and there both versions work with and wouthout slash. I assume that only the onPremise is broken in a sense that it likes the / in the end. But we will keep and eye on this.