Merge pull request #54 from openshift/fix_dotnet3_test

Fix example of dotnet3 test

Author: openshift-merge-robot

task/s2i-dotnet-3/0.1/tests/run.yaml

@@ -21,7 +21,7 @@ spec:
         - name: deleteExisting
           value: "true"
         - name: revision
-          value: dotnetcore-2.2
+          value: dotnetcore-3.1
     - name: s2i-dotnet-3-test
       taskRef:
         name: s2i-dotnet-3