static void addGemFirePropertyFile(final List<String> commandLine,
      final File gemfirePropertiesFile) {
    if (gemfirePropertiesFile != null) {
      commandLine.add("-DgemfirePropertyFile=" + gemfirePropertiesFile.getAbsolutePath());
    }
  }
Encapsulates methods used by StartServerCommand and StartLocatorCommand and their associated
tests.

@see StartLocatorCommand
@see StartServerCommand
geode-gfsh/src/main/java/org/apache/geode/management/internal/cli/commands/StartMemberUtils.java