Make run-in-docker script use Xenial

This will allow us to run Py35 tests while testing in the container

Change-Id: Ia95262c37a9eb843b8afdedf6e9adf76a9f5641f

docker/Dockerfile

@@ -1,4 +1,6 @@
-FROM ubuntu:14.04
+FROM ubuntu:16.04
+
+RUN apt update && apt install -y sudo
 
 RUN \
     groupadd dev && \
@@ -8,12 +10,11 @@ RUN \
 ENV DEBIAN_FRONTEND noninteractive
 
 RUN \
-    apt-get update && \
-    apt-get -y install \
+    apt -y install \
     sudo git vim wget \
     nginx \
     python-dev python3-dev python-pip \
-    libmysqlclient-dev mysql-client-5.6 mysql-server-5.6 libffi-dev\
+    libmysqlclient-dev mysql-client mysql-server libffi-dev\
     npm && \
     rm -rf /var/lib/apt/lists/* && \
     rm -rf /var/lib/mysql/* && \

docker/scripts/api-init-db

@@ -1,5 +1,7 @@
 #!/bin/bash
 [[ ${DEBUG_MODE} ]] && set -x
 mysql --no-defaults -S ${SQL_DIR}/mysql.socket -e 'CREATE DATABASE refstack;'
+mysql --no-defaults -S ${SQL_DIR}/mysql.socket -e 'set @@global.show_compatibility_56=ON;'
+
 cd /home/dev/refstack
 .venv/bin/python bin/refstack-manage upgrade --revision head