Synnefo

ci: Install x2goserver

ci: Automatic yes to apt-get prompts

ci: Fix bugs with path expansion

Python does not do any automatic path expansions.
User has to call functions such as expanduser() and
expandvars().

Add uesr's id_rsa.pub file as default ssh_keys file.

ci: Implement file lock mechanism for temp_config

Before writing to temp config file, acquire a lock
and re-read it's contents to make sure we don't
overwrite anything.

deploy: Performance tune for postgresql

Turn off fsync, synchronous_commit and full_pages_writer to speed up
postgresql. DB is not no longer crash-safe, but this is no needed for
tests.

Also, introduce 'testing_vm' setting to distinquish between the type of...