confmenu

- also tries to ensure, there can be only one IsisSystemEnvironment

instance at any time

- moving IsisSystemEnvironment one up in package hierarchy

- we hook into the Spring context's life-cycle and call _Context.clear()

when Spring is about to start the @PostConstuct phase

- also fixes a concurrent testing issue

To ease migration, provides a static IsisSystemEnvironment#get()

- rename old IsisConfiguration -> IsisConfigurationLegacy, to make space

for the new 'IsisConfiguration'

- moving IDE-support dependency (maven) to module 'config'

- Add missing '@Override' annotations

- Correct indentation

- Add file header (JAutodoc)

- o.a.i.core.runtime.* -> o.a.i.runtime.*