feat: #250 Encore remote artifact URL before API call

Signed-off-by: Laurent Broudoux <laurent.broudoux@gmail.com>

Author: lbroudoux

src/main/java/io/github/microcks/testcontainers/MicrocksContainer.java

@@ -862,7 +862,7 @@ private static void downloadArtifact(String microcksContainerHttpEndpoint, Remot
          httpConn.setRequestMethod("POST");
          httpConn.setDoOutput(true);
 
-         String requestBody = "mainArtifact=" + mainArtifact + "&url=" + remoteArtifact.getUrl();
+         String requestBody = "mainArtifact=" + mainArtifact + "&url=" + URLEncoder.encode(remoteArtifact.getUrl(), StandardCharsets.UTF_8.name());
 
          if (remoteArtifact.getSecretName() != null) {
             requestBody += "&secretName=" + remoteArtifact.getSecretName();