rebase: add storestatus support for transactions
This let's the status writing logic support transactions. This will be useful in
a later patch where we add a transaction around the entire rebase.
FROM debian:jessie
RUN apt-get update && apt-get install -y \
build-essential \
debhelper \
dh-python \
devscripts \
python \
python-all-dev \
python-docutils \
zip \
unzip