Update ProxyTarantoolClient documentation

Update ProxyTarantoolClient documentation according to our new documentation policy

Closes #307

Author: iDneprov

README.md

@@ -19,7 +19,7 @@ with sharding via [vshard](https://github.com/tarantool/vshard).
 Example of single instance Tarantool application and java app connected using cartridge-java.
 
 The easiest way to start experimenting with cartridge-java and single instance tarantool app is to use
-[single instance test](/src/test/java/io/tarantool/driver/integration/SingleInstanceExampleTest.java).
+[single instance test](/src/test/java/io/tarantool/driver/integration/SingleInstanceExampleIT.java).
 You can set breakpoints and run it in debug mode.
 Testcontainers will start [single instance tarantool application](src/test/resources/single-instance.lua) for you.
 So you will be able to manipulate data in Tarantool in real life through java expressions or Tarantool console.
@@ -34,9 +34,6 @@ https://github.com/tarantool/cartridge-java/blob/2f8e826deb9833a5deb6d21177527a4
 Example of client API usage
 https://github.com/tarantool/cartridge-java/blob/2f8e826deb9833a5deb6d21177527a46e8fdd039/src/test/java/io/tarantool/driver/integration/SingleInstanceExampleTest.java#L64-L79
 
-You can read more about Cartridge applications in its [documentation](https://www.tarantool.io/ru/doc/latest/how-to/getting_started_cartridge/).
-Also look at available Cartridge application [examples](https://github.com/tarantool/examples).
-
 If you use this code in another project don't forget to add `cartridge-driver` dependency:
 ```xml
 <dependency>

docs/ProxyTarantoolClient.md

@@ -6,40 +6,11 @@ This section shows the necessary settings for connecting to instances with a use
 stored functions or Cartridge roles implementing the API similar to the one of [tarantool/crud](https://github.com/tarantool/crud).
 Works with `tarantool/crud` 0.3.0+.
 
-See an example of how to set up a proxy client working with `tarantool/crud`:
+Example of TarantoolClient set up
+https://github.com/tarantool/cartridge-java/blob/67536ed2478794c414f7d0b291eaa5d35742fe4a/src/test/java/io/tarantool/driver/integration/ProxyTarantoolClientExampleIT.java#L45-L55
 
-```java
-class Scratch {
-    public static void main(String[] args) {
+Example of client API usage
+https://github.com/tarantool/cartridge-java/blob/8d094b784864ccf74a472fdd4f9419714374ca0b/src/test/java/io/tarantool/driver/integration/ProxyTarantoolClientExampleIT.java#L63-L104
 
-        TarantoolClient<TarantoolTuple, TarantoolResult<TarantoolTuple>> client = TarantoolClientFactory.createClient()
-                .withAddress("123.123.123.1")
-                // use the value of cluster_cookie parameter in the init.lua file in your Cartridge application
-                .withCredentials("admin", "secret-cluster-cookie")
-                .withProxyMethodMapping()
-                // also you may use a lambda function for specifying the proxy methods' names
-                .withProxyMethodMapping(builder -> builder.withSelectFunctionName("customSelect"))
-                .build();
-        
-        TarantoolSpaceOperations<TarantoolTuple, TarantoolResult<TarantoolTuple>> testSpace = client.space("testSpace");
-
-        // Use TarantoolTupleFactory for instantiating new tuples
-        TarantoolTupleFactory tupleFactory = new DefaultTarantoolTupleFactory(client.getConfig().getMessagePackMapper());
-        // Pass the field corresponding to bucket_id as null for tarantool/crud to compute it automatically
-        TarantoolTuple tuple = tupleFactory.create(1_000_000, null, "profile_name");
-        // Primary index key value will be determined from the tuple
-        Conditions conditions = Conditions.after(tuple);
-        TarantoolResult<TarantoolTuple> updateResult = testSpace.update(conditions, tuple).get();
-
-        Conditions conditions = Conditions.greaterOrEquals("profile_id", 1_000_000);
-        // crud.select(...) on the Cartridge router will be called internally
-        TarantoolResult<TarantoolTuple> selectResult = testSpace.select(conditions).get();
-        assertEquals(20, selectResult.size());
-
-        // Any other operations with tuples as described in the examples above
-        ...
-
-        client.close();
-    }
-}
-```
+You can read more about Cartridge applications in its [documentation](https://www.tarantool.io/ru/doc/latest/how-to/getting_started_cartridge/).  
+Also look at available Cartridge application [examples](https://github.com/tarantool/examples).