iOS certificate is not being validated

This line: https://github.com/aerogear/aerogear-unifiedpush-server/blob/master/jaxrs/src/main/java/org/jboss/aerogear/unifiedpush/rest/registry/applications/iOSVariantEndpoint.java#L187 is now commented out, but it was used to verify that the certificate is right and that the passphrase is correct.