test-framework: Test Script and Test Support Files should not be able to have same name.

[yc2lee]

Currently, if you upload a Test Script File called S and then upload a Test Support File with the same name S, then the Test Support File upload will overwrite the Test Script File. So in the end, there will just be one file in the data folder.

[umsmit32]

I'll take a look at this.

[danielstjules]

Fixed via #1045