context propagation restart fix

fixes quarkusio#2618

extensions/smallrye-context-propagation/runtime/src/main/java/io/quarkus/smallrye/context/runtime/SmallRyeContextPropagationTemplate.java

@@ -23,13 +23,10 @@ public class SmallRyeContextPropagationTemplate {
     public void configureStaticInit(List<ThreadContextProvider> discoveredProviders,
             List<ContextManagerExtension> discoveredExtensions) {
         // build the manager at static init time
-        try {
-            ContextManagerProvider.instance();
-            // the previous line will throw if already configured
+        // in the live-reload mode, the provider instance may be already set in the previous start
+        if (ContextManagerProvider.INSTANCE.get() == null) {
             ContextManagerProvider contextManagerProvider = new SmallRyeContextManagerProvider();
             ContextManagerProvider.register(contextManagerProvider);
-        } catch (IllegalStateException ignored) {
-            // already set
         }
 
         // do what config we can here, but we need the runtime executor service to finish