Adding test dependency and registering pytest marker

Author: bsipocz

setup.cfg

@@ -64,6 +64,7 @@ filterwarnings =
     ignore:tostring\(\) is deprecated. Use tobytes:DeprecationWarning:astropy
 markers =
     bigdata: marks tests that are expected to trigger a large download (deselect with '-m "not bigdata"')
+    noautofixt: disabling fixture autouse
 
 [ah_bootstrap]
 auto_use = True
@@ -171,6 +172,7 @@ test=
    jinja2
    flask
    pytest-dependency
+   pytest-rerunfailures
 docs=
    matplotlib
    sphinx-astropy>=1.5