title: Append release timestamp to helm template name
body: <p>I'm struggling with finding a way to include the <a href="https://docs.helm.sh/chart_template_guide/#built-in-objects" rel="noreferrer">Release.Time</a> builtin as part of a helm name. </p>
  
  <p>If I just include it as:
  <code>name: {{ template "myapp.name" . }}-{{ .Release.Time }}</code></p>
  
  <p>Dry run shows this:
  <code>name: myapp-seconds:1534946206 nanos:143228281
  </code></p>
  
  <p>It seems like this is a *timestamp.Timestamp object or something because <code>{{ .Release.Time | trimPrefix "seconds:" | trunc 10 }}</code> outputs <code>wrong type for value; expected string; got *timestamp.Timestamp
  </code></p>
  
  <p>I can hack the string parsing by doing: <code>{{ .Release.Time | toString | trimPrefix "seconds:" | trunc 10 }}</code>, but it seems like I should be able to call something on the Timestamp object to get the seconds. Is anyone aware of where the docs are for this? I can't find any reference to it at <a href="https://godoc.org/github.com/Masterminds/sprig" rel="noreferrer">https://godoc.org/github.com/Masterminds/sprig</a>.</p>