travis_wait for conda create

Author: roveo

.travis.yml

@@ -21,7 +21,7 @@ install:
   - conda update conda
 
   # Install dependencies
-  - conda env create --name test-streamz --file ./conda/environments/streamz_dev.yml
+  - travis_wait 30 conda env create --name test-streamz --file ./conda/environments/streamz_dev.yml
   - source activate test-streamz
 
   - python setup.py install