Cartographic.fromCartesian returns wrong results if the cartesian is not on the ellipsoid surface

[duvifn]

Hi,
I recently used Cartographic.fromCartesian method and got wrong results.
In order to see the problem please run the following code.
Currently it's logs 'false' to the console.

var cartographic1 = Cesium.Cartographic.fromDegrees(35.766989, 33.333602, 3000);
var cartesian1 = Cesium.Cartesian3.fromRadians(cartographic1.longitude, cartographic1.latitude, cartographic1.height);
var cartographic2 = Cesium.Cartographic.fromCartesian(cartesian1);

console.log(cartographic1.equalsEpsilon(cartographic2,Cesium.Math.EPSILON8)); //false

(Sandcastle)

I have noticed that Ellipsoid.cartesianToCartographic produces an accurate result in this case.
It seems that Cartographic.fromCartesian is a copy of Ellipsoid.cartesianToCartographic (it was probably cloned because requirejs doesn't properly handle circular dependencies).
However there is a typo in the Cartographic.fromCartesian version.

I fixed this typo and added two additional tests.