Redis integration for Analytics doesn't work on 1.5 and 1.6

[sabbyanandan]

As a user, I'm attempting to use the Analytics feature in SCDF, but I end up seeing the following error in the server logs in both 1.5.2 and 1.6 BS versions.

  2018-07-19T13:33:40.96-0700 [APP/PROC/WEB/0] OUT Caused by: redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
   2018-07-19T13:33:40.96-0700 [APP/PROC/WEB/0] OUT     at redis.clients.util.Pool.getResource(Pool.java:53) ~[jedis-2.9.0.jar!/:na]
   2018-07-19T13:33:40.96-0700 [APP/PROC/WEB/0] OUT     at redis.clients.jedis.JedisPool.getResource(JedisPool.java:226) ~[jedis-2.9.0.jar!/:na]
   2018-07-19T13:33:40.96-0700 [APP/PROC/WEB/0] OUT     at redis.clients.jedis.JedisPool.getResource(JedisPool.java:16) ~[jedis-2.9.0.jar!/:na]
   2018-07-19T13:33:40.96-0700 [APP/PROC/WEB/0] OUT     at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.fetchJedisConnector(JedisConnectionFactory.java:194) ~[spring-data-redis-1.8.13.RELEASE.jar!/:na]
   2018-07-19T13:33:40.96-0700 [APP/PROC/WEB/0] OUT     ... 87 common frames omitted
   2018-07-19T13:33:40.96-0700 [APP/PROC/WEB/0] OUT Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused)
   2018-07-19T13:33:40.96-0700 [APP/PROC/WEB/0] OUT     at redis.clients.jedis.Connection.connect(Connection.java:207) ~[jedis-2.9.0.jar!/:na]
   2018-07-19T13:33:40.96-0700 [APP/PROC/WEB/0] OUT     at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:93) ~[jedis-2.9.0.jar!/:na]
   2018-07-19T13:33:40.96-0700 [APP/PROC/WEB/0] OUT     at redis.clients.jedis.BinaryJedis.connect(BinaryJedis.java:1767) ~[jedis-2.9.0.jar!/:na]
   2018-07-19T13:33:40.96-0700 [APP/PROC/WEB/0] OUT     at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:106) ~[jedis-2.9.0.jar!/:na]

Notes:

• The same Redis SI appears to be working on v1.4.
• The same Redis SI works on a standalone REST App, too.