Fix libstriprados::remove, use strtoll insdead of strtol

Signed-off-by: Dongmao Zhang <deanraccoon@gmail.com>
Merge pull request #3137 from thesues/fix-strtol

Fix libstriprados::remove, use strtoll insdead of strtol

Reviewed-by: Sage Weil <sage@redhat.com>