code: function getStaleContainers(stdout /* : String */,
    minutesAgoInUnixTimestamp /* : number */,
    containerRetentionInMinutesParam /* : number */) /* : Array<string> */ {
    return stdout
      .split('\n')
      .filter(o => o.length > 0 && o.indexOf('cicontainer') !== -1)
      .filter((o) => {
        console.log(`inspecting container named: ${o} for cleanup`);
        const decision = (extractTimestampFromName(o, divider) <= minutesAgoInUnixTimestamp) ||
          (containerRetentionInMinutesParam === 0);
        if (decision) {
          console.log(`container named: ${o} is more than ${containerRetentionInMinutesParam ||
            containerRetentionInMinutes} minutes old and will be cleaned up`);
        } else {
          console.log(`container named: ${o} is fresh and will NOT be cleaned up`);
        }
        return decision;
      });
  }
docs: This method filters stale containers from the docker ps command
  e.g - here's an example of a docker ps output
  
  74934f702e5b cicontainerdenisekochanovitchzzdivzz1483974116_dct_s1_1
  490cd2f7f23e cicontainerdenisekochanovitchzzdivzz1483974116_dct_s2_1
  0a0d54af82ae cicontainerdenisekochanovitchzzdivzz1483974116_db_1
  
  The first value being the container Id and the second one is the container name.
  
  @param stdout
  @param minutesAgoInUnixTimestamp
  @param containerRetentionInMinutesParam
  @returns {Array.<String>}