General update for services to be Central-Instance compatible

Changes to pom.xml

1. Add new digit nexus repo under <repositories> tag

   <repository>
   <id>repo.digit.org</id>
   <name>eGov DIGIT Releases Repository</name>
   <url><https://nexus-repo.digit.org/nexus/content/repositories/snapshots/</url>>
   </repository>

2. Add Tracer 2.1.0

   <dependency>
     <groupId>org.egov.services</groupId>
     <artifactId>tracer</artifactId>
     <version>2.1.0-SNAPSHOT</version>
   </dependency>

3. Update the Kafka producer in the service with the following code to enable the service to post to a tenant(namespace) specific topic based on the tenant-id.

   @Service
   @Slf4j
   public class Producer {
   
   	@Autowired
   	private CustomKafkaTemplate<String, Object> kafkaTemplate;
   	
   	@Autowired
   	private PropertyConfiguration configs;
   
   	public void push(String tenantId, String topic, Object value) {
   
   		String updatedTopic = topic;
   		if (configs.getIsEnvironmentCentralInstance()) {
   
   			String[] tenants = tenantId.split("\\.");
   			if (tenants.length > 1)
   				updatedTopic = tenants[1].concat("-").concat(topic);
   		}
   		log.info("The Kafka topic for the tenantId : " + tenantId + " is : " + updatedTopic);
   		kafkaTemplate.send(updatedTopic, value);
   	}
   } 

4. { ADD if any new configs }