adding pytest-rerunfailures and reruning the first boutique test (fails sometimes on travis)

Author: djarecka

pydra/engine/tests/test_boutiques.py

@@ -25,6 +25,7 @@
 
 @no_win
 @need_bosh_docker
+@pytest.mark.flaky(reruns=2)
 @pytest.mark.parametrize(
     "maskfile", ["test_brain.nii.gz", "test_brain", "test_brain.nii"]
 )

setup.cfg

@@ -33,6 +33,7 @@ test_requires =
     pytest-cov
     pytest-env
     pytest-xdist
+    pytest-rerunfailures
     codecov
     numpy
     psutil
@@ -66,6 +67,7 @@ test =
     pytest-cov
     pytest-env
     pytest-xdist
+    pytest-rerunfailures
     codecov
     numpy
     pyld