Preserve plugin load order correctly

proxy/src/main/java/com/velocitypowered/proxy/plugin/VelocityPluginManager.java

@@ -28,6 +28,7 @@ import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.IdentityHashMap;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -84,7 +85,7 @@ public class VelocityPluginManager implements PluginManager {
     List<PluginDescription> sortedPlugins = PluginDependencyUtils.sortCandidates(found);
 
     Set<String> loadedPluginsById = new HashSet<>();
-    Map<PluginContainer, Module> pluginContainers = new HashMap<>();
+    Map<PluginContainer, Module> pluginContainers = new LinkedHashMap<>();
     // Now load the plugins
     pluginLoad:
     for (PluginDescription candidate : sortedPlugins) {