Tests in progress:
- AbstractPkgScope::getDesignation(VarId) renamed to getDesignationDef();
- AbstractPkgScope::getVersion(VarId) renamed to getVersionDef();
- PkgScopeBase::fullPkgData() now fills all package relations;
- AbstractPackageBackEnd::theSamePkg() is added;
- OsIntegrity disallows conflicts of the packages with themselves;
- system-imitation test allows TaskException and does not stop on them;
- system-imitation test saves the package lists to files on disk.