[releng] Use a better tinyproxy container in tests

'vimagick/tinyproxy' is adm64-only and doesn't work under emulation on
an ARM-based Mac. Use 'ajoergensen/tinyproxy' instead, which is a
multi-architecture container.

Author: tomaswolf

sshd-test/src/test/java/org/apache/sshd/client/proxy/ProxyHttpAuthIntegrationTest.java

@@ -54,7 +54,7 @@ class ProxyHttpAuthIntegrationTest extends AbstractContainerTestBase {
 
     private static final Logger LOG = LoggerFactory.getLogger(ProxyHttpAuthIntegrationTest.class);
 
-    private static GenericContainer<?> proxy = new GenericContainer<>("vimagick/tinyproxy") //
+    private static GenericContainer<?> proxy = new GenericContainer<>("ajoergensen/tinyproxy") //
             .withCopyFileToContainer(MountableFile.forClasspathResource("org/apache/sshd/proxy/tinyproxy-auth.conf"),
                     "/etc/tinyproxy/tinyproxy.conf") //
             .withExposedPorts(1080) //

sshd-test/src/test/java/org/apache/sshd/client/proxy/ProxyHttpIntegrationTest.java

@@ -48,7 +48,7 @@ class ProxyHttpIntegrationTest extends AbstractContainerTestBase {
 
     private static final Logger LOG = LoggerFactory.getLogger(ProxyHttpIntegrationTest.class);
 
-    private static GenericContainer<?> proxy = new GenericContainer<>("vimagick/tinyproxy") //
+    private static GenericContainer<?> proxy = new GenericContainer<>("ajoergensen/tinyproxy") //
             .withCopyFileToContainer(MountableFile.forClasspathResource("org/apache/sshd/proxy/tinyproxy.conf"),
                     "/etc/tinyproxy/tinyproxy.conf") //
             .withExposedPorts(1080) //