Although the tests are quite advanced, they are not really complete yet.
Most notably, group membership update in LDAP is not checked now.
We should include running Trigger Scanner in these tests eventually.

- Updated master branch with changes from the laboratory
- Temporarily removed obsolete demo/complex
- Fixed download script to reflect new URL of midPoint distribution server
- Upgraded midPoint to 4.0.1

This is only until update to Shibboleth 3 is done.

$tag is now defined in common.bash and used throughout building scripts.
The goal is to allow building and testing both from Jenkins and standalone.

build.sh is now more generic; allows rebuilding if -r is specified.

(trying to)

Now all components are started within single docker-compose.yml file.

This is to avoid collisions with the more stable
build from the "bats" branch.

Environmental variables and container names are improved.
Only demo/simple is OK now; other ones are inconsistent now.

1. xpath -> xmllint
2. added some docker containers cleanup

...and added cleanup step as well

Might fail if xpath is not installed.

Also with other minor enhancements.

1. demo/plain -> demo/simple
2. updated README.MD

The container is now built directly from the root directory.
Even the simplest composition was moved to demo/plain.

(only a dummy test for now)

1) There's now a cleanup step before and after running the tests
2) Tests check their results more thoroughly
3) Until MariaDB is changed, a temporary solution for down-up issue is present