fix(schema): Ignore any HTTP 404 on /config/<subject> endpoint of Sch…

…ema Registry (tchiotludo#765)

close tchiotludo#763 

Co-authored-by: Julien Chanaud <julien.chanaud@michelin.com>

src/main/java/org/akhq/repositories/SchemaRegistryRepository.java

@@ -226,7 +226,7 @@ public Schema.Config getConfig(String clusterId, String subject) throws IOExcept
                 .getConfig(subject)
             );
         } catch (RestClientException exception) {
-            if (exception.getErrorCode() != ERROR_NOT_FOUND) {
+            if (exception.getStatus() != 404) {
                 throw exception;
             }