Adapt to the move of OutputFormat to root gerrit package

Change-Id: Ib921d28715ddc6b6b3519f683b9193b65389efac
diff --git a/src/main/java/com/googlesource/gerrit/plugins/manager/ListAvailablePlugins.java b/src/main/java/com/googlesource/gerrit/plugins/manager/ListAvailablePlugins.java
index 76e7669..96fb53f 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/manager/ListAvailablePlugins.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/manager/ListAvailablePlugins.java
@@ -20,7 +20,7 @@
 import com.google.gerrit.extensions.restapi.RestApiException;
 import com.google.gerrit.extensions.restapi.RestReadView;
 import com.google.gerrit.extensions.restapi.TopLevelResource;
-import com.google.gerrit.server.OutputFormat;
+import com.google.gerrit.json.OutputFormat;
 import com.google.gson.JsonElement;
 import com.google.gson.reflect.TypeToken;
 import com.google.inject.Inject;
diff --git a/src/main/java/com/googlesource/gerrit/plugins/manager/gson/SmartGson.java b/src/main/java/com/googlesource/gerrit/plugins/manager/gson/SmartGson.java
index f8516e2..d26f829 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/manager/gson/SmartGson.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/manager/gson/SmartGson.java
@@ -14,7 +14,7 @@
 
 package com.googlesource.gerrit.plugins.manager.gson;
 
-import com.google.gerrit.server.OutputFormat;
+import com.google.gerrit.json.OutputFormat;
 import com.google.gson.Gson;
 import com.google.gson.JsonObject;
 import java.io.IOException;