private String springXml() {
    return "spring/spring-gemfire-context.xml";
  }
Extracted from {@link ServerLauncherLocalIntegrationTest}. This tests the same mechanism used by
Spring Data GemFire/Geode.

<p>
ServerLauncher.start fails to configure server with Spring
geode-core/src/integrationTest/java/org/apache/geode/distributed/ServerLauncherWithProviderRegressionTest.java