Fix import order in Spawner
The imports are not in alphabetical order in Spawner.java and this is a
crime that is rectified by this commit.
@@ -21,8 +21,8 @@ package org.elasticsearch.bootstrap;
import org.apache.lucene.util.IOUtils;
import org.elasticsearch.env.Environment;
-import org.elasticsearch.plugins.PluginInfo;
import org.elasticsearch.plugins.Platforms;
+import org.elasticsearch.plugins.PluginInfo;
import java.io.Closeable;
import java.io.IOException;
