Update nose2.cfg

fixed "doctests"

Author: ivailop

nose2.cfg

@@ -4,7 +4,7 @@ test-method-prefix=test
 plugins = nose2.plugins.coverage
           nose2.plugins.junitxml
           nose2.plugins.layers
-exclude-plugins = nose2.plugins.doctest
+exclude-plugins = nose2.plugins.doctests
 
 [layer-reporter]
 always-on = True