Fixed the logback serialization issue addressed in Cosmos DB SDK (#447)

pom.xml

@@ -58,7 +58,7 @@
         <gson.version>2.8.4</gson.version>
         <project.reactor.test.version>3.3.0.RELEASE</project.reactor.test.version>
 
-        <azure.cosmos.version>3.3.0</azure.cosmos.version>
+        <azure.cosmos.version>3.3.1</azure.cosmos.version>
         <azure.test.resourcegroup>spring-data-cosmosdb-test</azure.test.resourcegroup>
         <azure.test.dbname>testdb-${maven.build.timestamp}</azure.test.dbname>
         <skip.integration.tests>true</skip.integration.tests>

src/main/java/com/microsoft/azure/spring/data/cosmosdb/core/convert/MappingCosmosConverter.java

@@ -8,7 +8,6 @@ package com.microsoft.azure.spring.data.cosmosdb.core.convert;
 import com.azure.data.cosmos.CosmosItemProperties;
 import com.azure.data.cosmos.internal.Utils;
 import com.azure.data.cosmos.internal.query.QueryItem;
-import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.microsoft.azure.spring.data.cosmosdb.Constants;
@@ -16,7 +15,6 @@ import com.microsoft.azure.spring.data.cosmosdb.core.mapping.CosmosPersistentEnt
 import com.microsoft.azure.spring.data.cosmosdb.core.mapping.CosmosPersistentProperty;
 import com.microsoft.azure.spring.data.cosmosdb.exception.CosmosDBAccessException;
 import org.json.JSONObject;
-import org.slf4j.Logger;
 import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
@@ -54,11 +52,6 @@ public class MappingCosmosConverter
         this.conversionService = new GenericConversionService();
         this.objectMapper = objectMapper == null ? ObjectMapperFactory.getObjectMapper() :
             objectMapper;
-
-        // CosmosDB SDK serializes and deserializes logger, which causes this issue:
-        // https://github.com/microsoft/spring-data-cosmosdb/issues/423
-        //  This is a temporary fix while CosmosDB fixes this problem.
-        Utils.getSimpleObjectMapper().addMixIn(QueryItem.class, QueryItemMixIn.class);
     }
 
     @Override
@@ -185,9 +178,4 @@ public class MappingCosmosConverter
 
         return fromPropertyValue;
     }
-
-    interface QueryItemMixIn {
-        @JsonIgnore
-        Logger getLogger();
-    }
 }