GitLab

Fixes #60

Currently only the status of the main algorithm container
was taken into account to gather the stderr output of all
other containers. This patch changes this so that if
something fails but the main containers ends successfully
the other containers output can still be analysed.

The Docker and subprocess executors use one or more
temp folders during processing. This patch implements
proper removal of them when they are done.

There's a debug settings that can be used to switch
that cleanup off.

Explicitly set the name of the container and retrieve its
address with the new Host API.

All python files except from scripts are not executable
anymore.

 - Fix the database view 'DifferentFrequencies'  of 'integers_db/1'
 - Fix the path used by the CI to execute the tests
 - Fix the version of the docker images needed