RAIC: remove HP authentication endpoints from code and docs for OpenStack

[daira]

Dear HP Helion Public Cloud Customer,
 
As you have been previously notified, HP has announced that HP Helion Public Cloud will cease providing services to customers on January 31, 2016. This email serves as written notice that HP will terminate the Customer Agreement between you and HP, pursuant to the termination for convenience provision therein, effective January 31, 2016.
 
It is important that you shut down or move any workloads or data now on HP Helion Public Cloud by January 31, 2016, as there will be no access to your account after that date. If you have any questions contact HP Cloud Support.

So ​these HP authentication endpoints should be removed from the code and docs.