Fix warnings in code

Make OpenSpaceTest not flood the console on Jenkins
Fix Vec3 property to signal change correctly
Let RenderablePlanetProject correctly reload base map and height map
Update Ghoul

include/openspace/util/spicemanager.h

@@ -74,7 +74,7 @@ public:
 
         /**
          * Default constructor initializing the AberrationCorrection to Type::None with a
-         * Drection::Reception
+         * Direction::Reception
          */
         AberrationCorrection() = default;