OZG-6990 extend grpc util: adjust return type

ozgcloud-common-lib/src/main/java/de/ozgcloud/common/grpc/GrpcUtil.java

@@ -73,8 +73,8 @@ public class GrpcUtil {
 		return getList(HEADER_KEY_ACCESS_LIMITED_ORGAID, headers);
 	}
 
-	public static Optional<String> getAccessLimited(Metadata headers) {
-		return getFromHeaders(HEADER_KEY_ACCESS_LIMITED, headers);
+	public static Optional<Boolean> getAccessLimited(Metadata headers) {
+		return getFromHeaders(HEADER_KEY_ACCESS_LIMITED, headers).map(Boolean::parseBoolean);
 	}
 
 	public static Optional<String> getFromHeaders(String key, Metadata headers) {

ozgcloud-common-lib/src/test/java/de/ozgcloud/common/grpc/GrpcUtilTest.java

@@ -179,11 +179,11 @@ class GrpcUtilTest {
 	@Nested
 	class TestGetAccessLimited {
 
-		private static final String ACCESS_LIMITED = "access-limited";
+		private static final boolean ACCESS_LIMITED = true;
 
 		@Test
 		void shouldCallGetFromHeader() {
-			header.put(GrpcUtil.HEADER_KEY_ACCESS_LIMITED, ACCESS_LIMITED.getBytes());
+			header.put(GrpcUtil.HEADER_KEY_ACCESS_LIMITED, String.valueOf(ACCESS_LIMITED).getBytes());
 
 			var result = GrpcUtil.getAccessLimited(header);