Update osh-selenium for python3

This change updates the osh-selenium image to be built
on ubuntu:bionic and to use python3 instead of python2

Change-Id: Id47448a55866dcf582b9e3801ea5f57f11068242

osh-selenium/Dockerfile.ubuntu_bionic

@@ -1,9 +1,9 @@
-FROM docker.io/ubuntu:xenial
+FROM docker.io/ubuntu:bionic
 
 RUN apt-get -y update \
-        && apt-get install -y python-pip unzip wget
-
-RUN /usr/bin/pip install selenium
+        && apt-get install --no-install-recommends -y python3 python3-pip unzip wget gnupg \
+        && python3 -m pip install --upgrade pip \
+        && python3 -m pip install selenium
 
 RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \
         && sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list' \
@@ -11,6 +11,6 @@ RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key
         && unzip /tmp/chromedriver_linux64.zip -d /etc/selenium
 
 RUN apt-get -y update \
-        && apt-get install -y google-chrome-stable \
+        && apt-get install --no-install-recommends -y google-chrome-stable \
         && apt-get clean \
         && rm -rf /var/lib/apt/lists/*

osh-selenium/build.sh

@@ -6,7 +6,7 @@ cd ${SCRIPT_DIR}/..
 
 IMAGE="osh-selenium"
 VERSION=${VERSION:-latest}
-DISTRO=${DISTRO:-ubuntu_xenial}
+DISTRO=${DISTRO:-ubuntu_bionic}
 REGISTRY_URI=${REGISTRY_URI:-"openstackhelm/"}
 EXTRA_TAG_INFO=${EXTRA_TAG_INFO:-""}
 docker build -f ${IMAGE}/Dockerfile.${DISTRO} --network=host -t ${REGISTRY_URI}${IMAGE}:${VERSION}-${DISTRO}${EXTRA_TAG_INFO} ${extra_build_args} ${IMAGE}

zuul.d/osh-selenium.yaml

@@ -36,10 +36,10 @@
       docker_images:
         - context: osh-selenium
           repository: openstackhelm/osh-selenium
-          dockerfile: Dockerfile.ubuntu_xenial
+          dockerfile: Dockerfile.ubuntu_bionic
           tags:
-            - latest-ubuntu_xenial
-            - "ubuntu_xenial-{{ currentdate }}"
+            - latest-ubuntu_bionic
+            - "ubuntu_bionic-{{ currentdate }}"
         - context: osh-selenium
           repository: openstackhelm/osh-selenium
           dockerfile: Dockerfile.opensuse_15