Simplify GPU test environment

[devmotion]

This PR is used for debugging (and possibly fixing) the GPU errors we see lately.

I should add that the tests pass locally with CUDA 3.3.0.

[coveralls]

Pull Request Test Coverage Report for Build 960388896

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 94.672%

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Totals
Change from base Build 928044156:	0.0%
Covered Lines:	462
Relevant Lines:	488

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💛 - Coveralls

[codecov-commenter]

Codecov Report

Merging #106 (b04f493) into master (61f9fd7) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #106   +/-   ##
=======================================
  Coverage   94.67%   94.67%           
=======================================
  Files           7        7           
  Lines         488      488           
=======================================
  Hits          462      462           
  Misses         26       26           

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[devmotion]

OK, it seems it was caused by a bug in CUDA.jl that is already fixed in the master branch. Since a new version will be released tomorrow AFAIK, let's just wait until the new version is available.

[davibarreira]

I suppose you want to merge this before merging the other PR to guarantee that they all pass the test?

[devmotion]

Yes, and additionally the other PR requires a new version of NNlibCUDA (it is broken with CUDA#master).

[davibarreira]

Have the CUDA issues been solved?

[devmotion]

There hasn't been a new release of CUDA yet.