Ensure python test failure fails Travis

Author: vidartf

{{cookiecutter.github_project_name}}/.travis.yml

@@ -46,9 +46,11 @@ before_script:
 script:
   - |
     if [[ $GROUP == python ]]; then
+      EXIT_STATUS=0
       pushd $(mktemp -d)
-      py.test -l --cov-report xml:$TRAVIS_BUILD_DIR/coverage.xml --cov={{ cookiecutter.python_package_name }} --pyargs {{ cookiecutter.python_package_name }}
+      py.test -l --cov-report xml:$TRAVIS_BUILD_DIR/coverage.xml --cov={{ cookiecutter.python_package_name }} --pyargs {{ cookiecutter.python_package_name }} || EXIT_STATUS=$?
       popd
+      exit $EXIT_STATUS
     elif [[ $GROUP == js ]]; then
       npm test
     fi