fix: [hbase-cbt-replication] use instance/project URI in log (#3575)

* fix: Use instance/project URI in log

* remove trailing slash

Author: sushanb

hbase-migration-tools/bigtable-hbase-replication/bigtable-hbase-replication-core/src/main/java/com/google/cloud/bigtable/hbase/replication/CloudBigtableReplicator.java

@@ -119,7 +119,9 @@ static synchronized SharedResources getInstance(Configuration conf) {
         configurationCopy.set(BigtableOptionsFactory.CUSTOM_USER_AGENT_KEY, "HBaseReplication");
         // If an App profile is provided, it will be picked automatically by the connection.
         Connection connection = BigtableConfiguration.connect(configurationCopy);
-        LOG.info("Created a connection to CBT. " + projectId + "--" + instanceId);
+        LOG.info(
+            String.format(
+                "Created a connection to CBT. projects/%s/instances/%s", projectId, instanceId));
 
         INSTANCE = new SharedResources(connection, executorService);
       }