Factor out common code related to SIL migration in AnalysisMigrationProvider and SafetySpecToAnnotationMigrationProvider
Cleanup code in the following migration providers
- org.fortiss.af3.mira.model.migration.AnalysisMigrationProvider.migrateRequirements2170
- org.fortiss.af3.scheduling.migration.SafetySpecToAnnotationMigrationProvider.migrate
Suggested steps:
- factor out common code
- use simpler (and safer) way to obtain SIL literal
- See comments / TODOs in code for more details
(from redmine: issue id 2274, created on 2015-02-03, closed on 2015-03-31)