Update Couchbase connection details

Author: teetangh

src/main/resources/application.properties

@@ -1,8 +1,8 @@
 server.use-forward-headers=true
 server.forward-headers-strategy=framework
-spring.couchbase.bootstrap-hosts=couchbases://cb.fwu-oviwcpjq4v.cloud.couchbase.com
+spring.couchbase.bootstrap-hosts=DB_CONN_STR
 spring.couchbase.bucket.name=travel-sample
-spring.couchbase.bucket.user=kaustav
-spring.couchbase.bucket.password=Password123!
+spring.couchbase.bucket.user=DB_USERNAME
+spring.couchbase.bucket.password=DB_PASSWORD
 spring.couchbase.scope.name=inventory
 spring.mvc.pathmatch.matching-strategy=ANT_PATH_MATCHER