Clean up automated test suite dependencies
It’s been a long while since we cleaned up those deps, and it’s probable that some can be removed.
One specific point:
libxslt1-dev is not available on Debian Sid, and
supposedly is not needed since some of us have been running the
automated test suite without it on Sid. We should test if it’s not
needed on Debian Jessie too. At the same time we should check the other
dependencies that are not obviously required.
Feature Branch: test/10208-clean-up-deps