Earlier quoted context omitted.
That seems pretty reasonable, and maybe even necessary. If they're copying your code around or distributing it to users, they may need those rights. "..solely as necessary for Cloud Foundry to provide the Service..." is the key point, there.
Just so I understand you correctly, does that imply that their intention is to prevent being sued if they need to change your code in order for it to work on the platform, in the event of say, an upgrade of their core infrastructure? If so, that makes a lot more sense. Thanks.
But yes, it would also give them the right to change things as necessary to run the service. It could cover installing additional plugins like Heroku does, or munging config files, or even doing things like partially compiling source to some target.
By default, they really don't have the legal right to do a bunch of those things. Some of them are vague and arguable since hosting doesn't exactly fit into copyright law all the time, so companies will sometimes put in clauses like this that explicitly grant them rights that might otherwise seem like common sense. It may be obvious to you and me, but it's now spelled out in an agreement "just in case".