Replace InputStream bytes with InputStream.readAllBytes in Spring Clo…

…ud Config client

This not only results is less code, but it's also more efficient as
it generally results in less array copying

extensions/spring-cloud-config-client/runtime/src/main/java/io/quarkus/spring/cloud/config/client/runtime/VertxSpringCloudConfigGateway.java

@@ -2,7 +2,6 @@
 
 import static io.vertx.core.spi.resolver.ResolverProvider.DISABLE_DNS_RESOLVER_PROP_NAME;
 
-import java.io.ByteArrayOutputStream;
 import java.io.InputStream;
 import java.net.URI;
 import java.net.URISyntaxException;
@@ -168,14 +167,7 @@ private static byte[] storeBytes(Path keyStorePath)
     }
 
     private static byte[] allBytes(InputStream inputStream) throws Exception {
-        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
-        int nRead;
-        byte[] data = new byte[1024];
-        while ((nRead = inputStream.read(data, 0, data.length)) != -1) {
-            buffer.write(data, 0, nRead);
-        }
-        buffer.flush();
-        return buffer.toByteArray();
+        return inputStream.readAllBytes();
     }
 
     private URI determineBaseUri(SpringCloudConfigClientConfig springCloudConfigClientConfig) throws URISyntaxException {