Refactored v1 and v2 schema

See merge request !41

V2 information were kept in the v1 version of the schema.

This refactoring, while duplicating a bit of information about blocks
and analyzer, allows to have a better separation taking into account
the limitation of the json schema with regards to "object oriented"
definition. The main point being that new properties can't be added
to "subdefinitions" when setting "additionalProperties" to false.

Algorithm cxx v2 (replaces !37)

See merge request !40

This is now done as part of the cxx tests run. It allows to have
a prefix that is updated as part of the test run no matter where
the original prefix is taken from.

This avoids to depend on other tests running before to have all
algorithms built.

The DOCKER_TEST_DEBUG environment variable can be used to
enable executor debug mode.

Use the VERBOSE_TEST_LOGGING environment variable to
enable verbose logging for tests.

This reverts commit a6ab4867, reversing
changes made to 5c7900bc.

Bogus test phase.

Algorithm cxx v2

See merge request !37

Use mv rather than ln to handle algorithm libraries.