Tilesource and atlas with the same name causes bugs (DEF-2330)

[britzl]

Expected behaviour

I should be able to have a tilesource and atlas with the same base name. Or the editor should detect it and prevent me from giving them the same name.

Actual behaviour

The generated texture of the tilesource and atlas overwrite each other. This causes some really weird bugs with missing textures.

Steps to reproduce

Create a tilesource named foo.tilesource
Create an atlas named foo.atlas
Create a tilemap using foo.tilesource
Create gameobject A and attach the tilemap
Create gameobject B and attach a sprite and assign it an image from the atlas
Build and run. Notice that either the tilemap isn't rendered
Remove gameobject A or B
Build again. Notice an error message similar to WARNING:RESOURCE: Resource not found: /_generated_e27b97ae.texturec

---

Defold version	1.2.102
Defold sha	a0b6a84460b815c07ecdbfdf6318e1c5d624d424
Build time	2017-04-18T09:27:56.309759
OS name	Mac OS X
OS version	10.12.4
OS arch	x86_64
Java version	1.8.0_102-b14

[AGulev]

similar issue #660

[AGulev]

#2143

[lmntn]

with this issue I can’t nicely organize naming in the project :(