[CB-3491] Fixed mobilespec storage test to include check for openDatabase function
[CB-3491] Fixed mobilespec storage test to include check for
openDatabase function

- added jasmine test

apache/cordova-mobile-spec,ollie314/cordova-mobile-spec,ollie314/cordova-mobile-spec,polyvi/xface-mobile-spec,corimf/cordova-mobile-spec,ollie314/cordova-mobile-spec,apache/cordova-mobile-spec,corimf/cordova-mobile-spec,apache/cordova-mobile-spec,polyvi/xface-mobile-spec,ollie314/cordova-mobile-spec,corimf/cordova-mobile-spec,polyvi/xface-mobile-spec,corimf/cordova-mobile-spec,corimf/cordova-mobile-spec,ollie314/cordova-mobile-spec,apache/cordova-mobile-spec,apache/cordova-mobile-spec