add pyroute2

Signed-off-by: Arvindsrinivasan Lakshmi Narasimhan <[email protected]>

Author: arlakshm

sonic-slave-stretch/Dockerfile.j2

@@ -348,7 +348,7 @@ RUN pip install j2cli==0.3.10
 # Remove python-click 6.6
 RUN apt-get purge -y python-click
 # For sonic utilities testing
-RUN pip install click-default-group click natsort tabulate netifaces==0.10.7 fastentrypoints
+RUN pip install click-default-group click natsort tabulate netifaces==0.10.7 fastentrypoints pyroute2==0.5.14
 
 # For sonic snmpagent build and mock testing
 RUN pip3 install -U setuptools