HADOOP-15644. Hadoop Docker Image Pip Install Fails on branch-2 (haibochen via rkanter)

(cherry picked from commit a7163886ce6b52b9d3d3e1a19b17be49df1957be)

dev-support/docker/Dockerfile

@@ -122,7 +122,7 @@ RUN apt-get -q install --no-install-recommends -y bats
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 # Install pylint
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-RUN pip install pylint
+RUN pip install pylint==1.9.2
 
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 # Install dateutil.parser