Including books collection

Author: ricardohsmello

java/103_aggregation_pipeline_lookup.ipynb

@@ -55,7 +55,6 @@
     "import org.bson.Document;\n",
     "\n",
     "// Configure SLF4J Simple Logger to suppress MongoDB driver logs in the notebook output.\n",
-    "\n",
     "System.setProperty(\"org.slf4j.simpleLogger.defaultLogLevel\", \"off\");\n",
     "System.setProperty(\"org.slf4j.simpleLogger.log.org.mongodb.driver\", \"off\");\n",
     "\n",
@@ -72,7 +71,8 @@
     "}\n",
     "\n",
     "MongoDatabase library = mongoClient.getDatabase(\"library\");\n",
-    "MongoCollection<Document> authors = library.getCollection(\"authors\");"
+    "MongoCollection<Document> authors = library.getCollection(\"authors\");\n",
+    "MongoCollection<Document> books = library.getCollection(\"books\");"
    ]
   },
   {