Create a giveup_acl method that Obsolete one's specified ACL on all branches of a package
Link the Give Up Admin Access to the giveup_acl method
Let request_acl retrieve the list of branches that exists for this package

Rather than the list of all active branches which means, some of these
branches might not exist for this package.
package is the object and we need its name, adjust as required
be consistent with the url pattern used
Simplify the tests as the logic behaves a bit differently from before
Add method request_acl_all_branch to request a specific ACL on all branches of a package
Link the button 'Request Admin Access' to the request_acl_all_branch method
Simplify the request_acl_all_branch and giveup_acl iteration

And fix the retrieval of the active branches