[OPENIDM-4223] Updated samples for assignment refactoring

update default mapping for source_missing according to OPENIDM-1264. Reviewed by Orsi via Skype

[OPENIDM-1913] add admin role to usecase sample users (missed from earlier commit)

[IDME-68] property name alignment in usecase samples email sending fix

Changed "name" to "file" in script configs

Change script paths to relative to where ScriptRegistry looks for them Change script parameter key from "file" to "name"

[OPENIDM-1336] independent sample usecases, runnable by -p option