Fixes bug in JedisClusterInfoCache.discoverClusterNodesAndSlots. (#2682)

Calls jedis.Clusterslots before calling reset, instead of the other way around.

Co-authored-by: M Sazzadul Hoque <7600764+sazzad16@users.noreply.github.com>

Co-authored-by: EC2 Default User <ec2-user@ip-172-31-47-142.us-west-2.compute.internal>
Co-authored-by: M Sazzadul Hoque <7600764+sazzad16@users.noreply.github.com>

Author: 3 people

src/main/java/redis/clients/jedis/JedisClusterInfoCache.java

@@ -104,12 +104,10 @@ public JedisClusterInfoCache(final GenericObjectPoolConfig<Jedis> poolConfig,
   }
 
   public void discoverClusterNodesAndSlots(Jedis jedis) {
+    List<Object> slots = jedis.clusterSlots();
     w.lock();
-
     try {
       reset();
-      List<Object> slots = jedis.clusterSlots();
-
       for (Object slotInfoObj : slots) {
         List<Object> slotInfo = (List<Object>) slotInfoObj;