Added tests for deleting an asset and deleting all assets in a node.
Added tests for deleting an asset and deleting all assets in a node.

Solid-Interactive/grasshopper-core-nodejs,mjmostachetti/grasshopper-core-nodejs,grasshopper-cms/grasshopper-core-nodejs,Solid-Interactive/grasshopper-core-nodejs,mjmostachetti/grasshopper-core-nodejs,grasshopper-cms/grasshopper-core-nodejs