Add support for binary/octet-stream.

Quay.io responds with binary/octet-stream when reading imageBlob.

application/octet-stream is identical to binary/octet-stream.

Fixes spring-cloud#5885

spring-cloud-dataflow-container-registry/src/main/java/org/springframework/cloud/dataflow/container/registry/ContainerImageRestTemplateFactory.java

@@ -210,6 +210,7 @@ private RestTemplate initRestTemplate(HttpClientBuilder clientBuilder, boolean w
 		ArrayList<MediaType> mediaTypeList = new ArrayList(octetSupportJsonConverter.getSupportedMediaTypes());
 		mediaTypeList.add(MediaType.APPLICATION_OCTET_STREAM);
 		mediaTypeList.add(MediaType.TEXT_PLAIN);
+		mediaTypeList.add(MediaType.parseMediaType("binary/octet-stream")); // quay.io responds with binary/octet-stream instead of application/octet-stream
 		octetSupportJsonConverter.setSupportedMediaTypes(mediaTypeList);
 
 		return restTemplateBuilder