Add missing hexpire and httl in distributed

Author: vietqhoang

lib/redis/distributed.rb

@@ -858,6 +858,16 @@ def hmset(key, *attrs)
       node_for(key).hmset(key, *attrs)
     end
 
+    # Set the expiration for hash fields in seconds
+    def hexpire(key, ttl, *fields)
+      node_for(key).hexpire(key, ttl, *fields)
+    end
+
+    # Returns the ttl of the hash fields
+    def httl(key, *fields)
+      node_for(key).httl(key, *fields)
+    end
+
     def mapped_hmset(key, hash)
       node_for(key).hmset(key, hash)
     end