HBASE-24739 [Build] branch-1's build seems broken because of pylint (#2065)

* Specify the version
* by using apt-get instead of pip install
* Remove comment blocks

Signed-off-by: Bharath Vissapragada <bharathv@apache.org>
Signed-off-by: Lars Hofhansl <larsh@apache.org>
Signed-off-by: Viraj Jasani <vjasani@apache.org>

dev-support/docker/Dockerfile

@@ -60,6 +60,7 @@ RUN apt-get -q update && apt-get -q install --no-install-recommends -y \
     python \
     python2.7 \
     python-pip \
+    pylint \
     rsync \
     snappy \
     xz-utils \
@@ -111,11 +112,6 @@ RUN mkdir -p /opt/findbugs && \
     tar xzf /opt/findbugs.tar.gz --strip-components 1 -C /opt/findbugs
 ENV FINDBUGS_HOME /opt/findbugs
 
-####
-# Install pylint
-####
-RUN pip install pylint==1.9.2
-
 ####
 # Install dateutil.parser
 ####