Verification reporting: Missing range is thrown unexpectedly

The attached guided decision table contain next to the expected verification messages also message about Missing range. These messages about Missing range are false positives and they shouldn't be present in the verification reporting.

To reproduce:

1. Open the example mortgages project
2. Navigate into the package: mortgages.mortgages
3. Upload there all attached GDSTs:
   • subsumptionAndMissingAction.gdst
   • subsumptionAndRedundacy.gdst
   • redundancyAndConflicts.gdst
4. Open subsumptionAndMissingAction.gdst and see the verification report
   • Subsumptant rows - correct
   • Rule has no action - correct
   • Missing range - incorrect
5. Open subsumptionAndRedundancy.gdst and see the verification report
   • Subsumptant rows - correct
   • Redundant rows - correct
   • Missing range - incorrect
6. Open redundancyAndConflicts.gdst and see the verification report
   • Conflicting rows - correct
   • Redundant rows - correct
   • Missing range - incorrect

Please unignore tests form PR https://github.com/kiegroup/drools-wb/pull/435 once the issue is fixed.