CP-4091: Fix bug in capability reparsing

We accidentally used the original parse_features function to convert
(string,int64) features to (capability,int64) features. This won't work because
the version numbers have already been stripped from the capability string at
this point, and parse_features will just assign the resulting features a
version number of 1.

Signed-off-by: Mike McClurg <mike.mcclurg@citrix.com>