Update service functions maintain create auditing fields

src/main/java/com/mattrixwv/raidbuilder/service/RaidInstanceService.java

@@ -32,6 +32,10 @@ public class RaidInstanceService{
 	}
 
 	public RaidInstance updateRaidInstance(RaidInstance raidInstance){
+		RaidInstance existingRaidInstance = raidInstanceRepository.findById(raidInstance.getRaidInstanceId()).orElseThrow();
+		raidInstance.setCreatedBy(existingRaidInstance.getCreatedBy());
+		raidInstance.setCreatedDate(existingRaidInstance.getCreatedDate());
+
 		return raidInstanceRepository.save(raidInstance);
 	}