Update retrying client documentation

Update retrying client documentation according to our new documentation policy

Closes #309

docs/RetryingTarantoolClient.md

@@ -11,38 +11,14 @@ By default, failed requests will be repeated only for some known network problem
 Some retry policies are available in the `TarantoolRequestRetryPolicies` class, but you may use your own implementations.
 If you want to use proxy calls or retry settings only for a number of requests, you may use configureClient(client)
 in `TarantoolClientFactory` for making a new configured client instance. Note, that the new instance will share the same
-connection pool and basic client settings, and only augment the behavior of the client.
-See an example below:
-
-```java
-
-TarantoolClient<TarantoolTuple, TarantoolResult<TarantoolTuple>> setupClient() {
-    return TarantoolClientFactory.createClient()
-        .withCredentials("admin", "secret-cluster-cookie")
-        .withAddress(container.getRouterHost(), container.getRouterPort())
-        .withProxyMethodMapping()
-        .build();
-}
-
-TarantoolClient<TarantoolTuple, TarantoolResult<TarantoolTuple>> retrying(
-    TarantoolClient<TarantoolTuple, TarantoolResult<TarantoolTuple>> client, int retries, long delay) {
-        return TarantoolClientFactory.configureClient(client)
-                    .withRetryingByNumberOfAttempts(
-                    retries,
-                    // you can use default predicates from TarantoolRequestRetryPolicies for checking errors
-                    TarantoolRequestRetryPolicies.retryNetworkErrors()
-                    // also you can use your own predicates and combine them with each other or with defaults
-                        .or(e -> e.getMessage().contains("Unsuccessful attempt"))
-                        .or(TarantoolRequestRetryPolicies.retryTarantoolNoSuchProcedureErrors()),
-                    policy -> policy.withDelay(delay))
-                    .build();
-        }
-
-...
-
-    TarantoolClient<TarantoolTuple, TarantoolResult<TarantoolTuple>> client = setupClient();
-    String result = retrying(client, 4, 500).callForSingleResult("retrying_function", String.class).get();
-    assertEquals("Success", result);
-    result = retrying(client, 2, 1000).callForSingleResult("retrying_function", String.class).get();
-    assertEquals("Success", result);
-```
+connection pool and basic client settings, and only augment the behavior of the client.  
+
+You can set up basic client
+https://github.com/tarantool/cartridge-java/blob/ba5602651a89132ead5f33f00a1a4462bce117d0/src/test/java/io/tarantool/driver/integration/ReconnectIT.java#L109-L123
+And reuse it then you need retrying client
+https://github.com/tarantool/cartridge-java/blob/ba5602651a89132ead5f33f00a1a4462bce117d0/src/test/java/io/tarantool/driver/integration/ReconnectIT.java#L153-L171
+But you don't have to set up basic client if you need retying client only.
+All methods of client builder with prefix `withRetrying` can be used with `createClient`.
+
+And example of client API usage if you specify using the default CRUD proxy operations mapping configuration 
+https://github.com/tarantool/cartridge-java/blob/8a880423da1ce2bc0e82557d70ab46c9e7eba618/src/test/java/io/tarantool/driver/integration/ProxyTarantoolClientExampleIT.java#L64-L107