Foreman Maintain

Add --whitelist option

Allows to mark some steps to be ignored in the results: allows to
continue even when some checks are failing.

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...

Assumeyes option

Improve reporting on hammer setup and preparation steps

Hammer setup preparation step

Decouple more reporter from runner

Before this commit, we required the reporter to call back runner
methods, which complicated the things. Also the multiple-steps select
was not working properly.

After this change, the reporter just returns a decision as result of...

Fixes #3 - Add option to skip the prompted step

Compatiblity with rubocop v0.48.0

1. Disabled: Use %i or %I for an array of symbols
2. Fixed: Use 2 spaces for indentation in a heredoc by using some library(e.g. ActiveSupport's String#strip_heredoc). Created foreman_maintain/core_ext.rb extend String class....

Make the spinner opt-in, not opt-out

The default spinner caused issues when one needs to interact with the
user (printing additional messages). As it's needed only for long
running actions, it should not be enforced by default.

Run confine against classes, not objects

This allows us to have multiple objects of the same procedure in the
system, differing in the constructor parameters. Useful for parametrized
procedures.

Fix loading of features from confine

With some ordering, the features could get tried to be detected twice.

tests for health commands

Move lib-specific tests to separate directory