Duplicated attribute namespace_id when creating project

[jflefebvre06]

public Project createProject(final Project project, final String importUrl) throws GitLabApiException {

    final Namespace namespace = project.getNamespace();
    if (namespace != null && namespace.getId() != null) {
        formData.withParam("namespace_id", namespace.getId());
    }

...

     if (project.getNamespace() != null) {
         formData.withParam("namespace_id", project.getNamespace().getId());
     }

}