Declare interval as non dynamic

Author: nvazquez

engine/orchestration/src/main/java/org/apache/cloudstack/engine/orchestration/NetworkOrchestrator.java

@@ -4869,7 +4869,7 @@ public String getConfigComponentName() {
     public static final ConfigKey<Integer> NetworkGcWait = new ConfigKey<Integer>(Integer.class, "network.gc.wait", "Advanced", "600",
             "Time (in seconds) to wait before shutting down a network that's not in used", false, Scope.Global, null);
     public static final ConfigKey<Integer> NetworkGcInterval = new ConfigKey<Integer>(Integer.class, "network.gc.interval", "Advanced", "600",
-            "Seconds to wait before checking for networks to shutdown", true, Scope.Global, null);
+            "Seconds to wait before checking for networks to shutdown", false, Scope.Global, null);
 
     @Override
     public ConfigKey<?>[] getConfigKeys() {