Add missing jedis dependency to build.gradle and pom.xml

`Jedis` is an optional dependency in `SD Redis` as one might make use of `Lettuce`, `SRP` or `JRedis`. 

The current `ClassNotFoundException` results in `jedis` depending on `commons-pool` for its configuration which is more or less required by the used  `JedisConnectionFactory`.

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I also want to point your attention to the fact that with [jedis 2.3](https://github.com/xetorthio/jedis/releases/tag/jedis-2.3.0) the used pool changed to `commons-pool2` which is also used in `SD Redis 1.2.0`.