This MR addresses the following issues:
- It enables docker-based tests to run on both our Linux and MacOS CI, avoiding altogether the use of an extra processing phase
- It homogenises the build scripts so they can both be used in the context of the CI (conda-build) or through buildout
Note on paths: Some of the paths included in BEAT databases were changed into values that are acceptable to the MacOS builder. The reason for that change relates to the way Docker for Mac works, preventing unregistered directories from the mac host to be docker-mounted on guest containers. The changes were executed so as the tests preserve their meaning - some of the tests, for instance, have explicit wrong directories (that don't exist).