Fix #1210 - use put method to set headers in oauth2 delegate to avoid immutable error

Signed-off-by: gabriel-farache <[email protected]>

Author: gabriel-farache

client/oidc/src/main/java/io/quarkiverse/openapi/generator/oidc/ClassicOidcClientRequestFilterDelegate.java

@@ -1,6 +1,7 @@
 package io.quarkiverse.openapi.generator.oidc;
 
 import java.io.IOException;
+import java.util.Collections;
 
 import jakarta.annotation.Priority;
 import jakarta.enterprise.inject.spi.InjectionPoint;
@@ -42,7 +43,7 @@ protected java.util.Optional<String> clientId() {
     public void filter(ClientRequestContext requestContext) throws IOException {
         try {
             String accessToken = this.getAccessToken();
-            requestContext.getHeaders().add(HttpHeaders.AUTHORIZATION, "Bearer " + accessToken);
+            requestContext.getHeaders().put(HttpHeaders.AUTHORIZATION, Collections.singletonList("Bearer " + accessToken));
         } catch (DisabledOidcClientException ex) {
             LOG.debug("Client is disabled, acquiring and propagating the token is not necessary");
         } catch (RuntimeException ex) {

client/oidc/src/main/java/io/quarkiverse/openapi/generator/oidc/ReactiveOidcClientRequestFilterDelegate.java

@@ -1,6 +1,7 @@
 package io.quarkiverse.openapi.generator.oidc;
 
 import java.io.IOException;
+import java.util.Collections;
 
 import jakarta.annotation.Priority;
 import jakarta.enterprise.inject.spi.InjectionPoint;
@@ -57,8 +58,8 @@ public void filter(ResteasyReactiveClientRequestContext requestContext) {
         requestContext.suspend();
 
         super.getTokens().subscribe().with(tokens -> {
-            requestContext.getHeaders().putSingle(HttpHeaders.AUTHORIZATION,
-                    BEARER_SCHEME_WITH_SPACE + tokens.getAccessToken());
+            requestContext.getHeaders().put(HttpHeaders.AUTHORIZATION,
+                Collections.singletonList(BEARER_SCHEME_WITH_SPACE + tokens.getAccessToken()));
             requestContext.resume();
         }, t -> {
             if (t instanceof DisabledOidcClientException) {