MT#17293 Switch Dockerfile to use a sipwise-jessie image

This way we get a Debian Jessie system with Sipwise mirrors and need
not do any additional setup.

Change-Id: I87330a0deef80c2c8ae301aa297bd349841f34f1

t/Dockerfile

@@ -1,22 +1,11 @@
-# TODO - switch to sipwise internal one
-FROM debian:jessie
+# DOCKER_NAME=repoapi-jessie
+FROM docker.mgm.sipwise.com/sipwise-jessie:latest
 
 # Important! Update this no-op ENV variable when this Dockerfile
 # is updated with the current date. It will force refresh of all
 # of the base images and things like `apt-get update` won't be using
 # old cached versions when the Dockerfile is built.
-ENV REFRESHED_AT 2015-12-07
-
-# mirrors behind httpredir randomly throw `Error reading from server. Remote end closed connection`
-# and we want to be independent from any external services anyway
-# TODO - the release-trunk-jessie is too dynamic yet, though required for some build/test dependencies
-RUN apt-get update && apt-get -y install apt-transport-https wget
-RUN echo "# generated by Dockerfile from repoapi-jessie at $(date)\n\
-deb https://debian.sipwise.com/debian jessie main non-free\n\
-deb https://debian.sipwise.com/debian jessie-updates main non-free\n\
-deb https://debian-security.sipwise.com/debian-security jessie-security main contrib non-free\n\
-deb https://deb.sipwise.com/autobuild/ release-trunk-jessie main\n" > /etc/apt/sources.list
-RUN wget -O /etc/apt/trusted.gpg.d/sipwise.gpg https://deb.sipwise.com/spce/sipwise.gpg
+ENV REFRESHED_AT 2016-01-12
 
 RUN apt-get update
 RUN apt-get install --assume-yes python2.7 python2.7-dev python-distribute python-pip git
@@ -37,8 +26,8 @@ WORKDIR /code/
 # % docker run --rm -i -t -v $(pwd)/..:/code:rw repoapi-jessie:latest bash
 #
 # Use the existing docker image:
-# % docker pull docker1.mgm.sipwise.com/repoapi-jessie
-# % docker run --rm -i -t -v $(pwd)/..:/code:rw docker1.mgm.sipwise.com/repoapi-jessie:latest bash
+# % docker pull docker.mgm.sipwise.com/repoapi-jessie
+# % docker run --rm -i -t -v $(pwd)/..:/code:rw docker.mgm.sipwise.com/repoapi-jessie:latest bash
 #
 # Inside docker (the command is in history, just press UP button):
 #   ./t/testrunner