[spec] Add additional detail on the success callback test.
[spec] Add additional detail on the success callback test.

chrisland/phonegap-plugin-contentsync,revolunet/phonegap-plugin-contentsync,chrisland/phonegap-plugin-contentsync,purplecabbage/phonegap-plugin-contentsync,chrisland/phonegap-plugin-contentsync,phonegap/phonegap-plugin-contentsync,revolunet/phonegap-plugin-contentsync,purplecabbage/phonegap-plugin-contentsync,phonegap/phonegap-plugin-contentsync,revolunet/phonegap-plugin-contentsync,phonegap/phonegap-plugin-contentsync,purplecabbage/phonegap-plugin-contentsync,revolunet/phonegap-plugin-contentsync,purplecabbage/phonegap-plugin-contentsync,phonegap/phonegap-plugin-contentsync,phonegap/phonegap-plugin-contentsync,chrisland/phonegap-plugin-contentsync,purplecabbage/phonegap-plugin-contentsync,chrisland/phonegap-plugin-contentsync,revolunet/phonegap-plugin-contentsync,phonegap/phonegap-plugin-contentsync