Foreman Maintain

Add context into scenario

Context adds to scenario an ability to distribute own parameters
to included executables. Scenario accepts parameters and keeps mapping
of the params to params of the executables. The mapping is opt-in
so each executable gets just the correct params....

Fixes #20623 - Failed scenario should exit with code 1

Fixes #20848 - Fix error messages indentation

Support for run_once procedures and repositories setup

Rollback support if the upgrade fails soon enough

Extract control flow of upgrades to special file

Introduce run_strategy for scenarios

Health-check scenarios are better to run all steps regardless of errors
(:fail_slow strategy), while the migration scenarios should fail as soon
as first failure happens (:fail_fast strategy).

By default, the scenarios are treated as `:fail_fast`.

Full upgrade scenario

This commit intoroduces more structured upgrade scenario consisting of
this scenarios:

• pre_upgrade_check - non-modifying checks: is the system ready?
• pre_migrations - modifying procedures before source update
• migrations - source update and main migrations...

Fixes #44 - Change tag 'basic' to 'default'

Fixes #3 - Add option to skip the prompted step