refactor: add the create_cache_cluster, delete_cache_cluster and desc…

…ribe_cache_clusters methods

docs/docs/services/elasticache.rst

@@ -33,7 +33,7 @@ elasticache
 - [ ] batch_stop_update_action
 - [ ] complete_migration
 - [ ] copy_snapshot
-- [ ] create_cache_cluster
+- [x] create_cache_cluster
 - [ ] create_cache_parameter_group
 - [ ] create_cache_security_group
 - [ ] create_cache_subnet_group
@@ -44,7 +44,7 @@ elasticache
 - [ ] create_user_group
 - [ ] decrease_node_groups_in_global_replication_group
 - [ ] decrease_replica_count
-- [ ] delete_cache_cluster
+- [x] delete_cache_cluster
 - [ ] delete_cache_parameter_group
 - [ ] delete_cache_security_group
 - [ ] delete_cache_subnet_group
@@ -53,7 +53,7 @@ elasticache
 - [ ] delete_snapshot
 - [X] delete_user
 - [ ] delete_user_group
-- [ ] describe_cache_clusters
+- [x] describe_cache_clusters
 - [ ] describe_cache_engine_versions
 - [ ] describe_cache_parameter_groups
 - [ ] describe_cache_parameters
@@ -70,10 +70,10 @@ elasticache
 - [ ] describe_update_actions
 - [ ] describe_user_groups
 - [X] describe_users
-  
+
         Only the `user_id` parameter is currently supported.
         Pagination is not yet implemented.
-        
+
 
 - [ ] disassociate_global_replication_group
 - [ ] failover_global_replication_group