code: private static String convertToPropertiesKey(String environmentVariableKey, String environmentContext) {
      return environmentVariableKey.substring(environmentContext.length()).replace(ENV_DELIMITER, PROPERTIES_DELIMITER);
    }
docs: Convert the Environment Variable Name to the expected Properties Key formatting
  
  @param environmentVariableKey The Env Variable Name, possibly prefixed with the {@link Environment} which
  in this context serves as a way to namespace variables
  @param environmentContext     The Environment context in format: ENVIRONMENTNAME_
  @return A {@link String} with the environment prefix removed and all underscores converted to periods