Add missing @Override annotations

Change-Id: I77e5e67fc54eed8cc9b8984ea4f7f7cd39c09f5a

src/main/java/com/googlesource/gerrit/plugins/rabbitmq/config/PluginProperties.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/rabbitmq/config/PluginProperties.java b/src/main/java/com/googlesource/gerrit/plugins/rabbitmq/config/PluginProperties.java
index 9c978b2..729684d 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/rabbitmq/config/PluginProperties.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/rabbitmq/config/PluginProperties.java
@@ -175,6 +175,7 @@
     return MINIMUM_CONNECTION_MONITOR_INTERVAL;
   }
 
+  @Override
   public AMQProperties getAMQProperties() {
     if (amqProperties == null) {
       amqProperties = new AMQProperties(this);

src/main/java/com/googlesource/gerrit/plugins/rabbitmq/solver/version/V1.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/rabbitmq/solver/version/V1.java b/src/main/java/com/googlesource/gerrit/plugins/rabbitmq/solver/version/V1.java
index 29d7bb3..4a9cb9f 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/rabbitmq/solver/version/V1.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/rabbitmq/solver/version/V1.java
@@ -55,6 +55,7 @@
    * new : data/rabbitmq/rabbitmq.config
    *       data/rabbitmq/site/default.config
    */
+  @Override
   public void solve() {
     try {
       Path oldFile = etcDir.resolve(pluginName + FILE_EXT);