Hitansu | Issue: Not able to download the patient from National Registry | when city corporation,urban id are null,not taking them to consideration

When cityCorporation,urban id is null,it fails to get the entry from
the AddressHierarchyEntry as the checks through hibernate Restriction
fails.
Neha,Sanjana | #244 | Introduced MedicationPrescriptionMapper for encounter download
Neha,Sanjana | #244 | Mapped drug route.
Neha | bdshr-244 | mapping frequency and Duration from fhir medication prescription to drug order.
Neha | Refactoring. Moving encounter bundles and test datasets to directories.
Neha | bdshr-244 | mapping scheduled date for drug order from medication prescription.
Neha,Sanjana | #244 | Enriched concept lookup to include value set search.