This is also for arvados_sdk_version support. I thought pip was a
dependency of virtualenv, but it's not. Refs #7321.
RUN apt-key adv --keyserver pool.sks-keyservers.net --recv 1078ECD7
RUN apt-get update -q
-RUN apt-get install -qy git python-minimal python-virtualenv python-arvados-python-client python-dev libcurl4-gnutls-dev
+RUN apt-get install -qy git python-pip python-virtualenv python-arvados-python-client python-dev libcurl4-gnutls-dev
RUN gpg --keyserver pool.sks-keyservers.net --recv-keys D39DC0E3