Expose time.LoadLocation to template system

[lfdominguez]

This allow to render time dates with custom time zones, for example if you have a devops team in different time zones and you want create a message template with the .app.status.operationState.finishedAt rendered to different locations.

Message example:

Application `{{.app.metadata.name}}` has been successfully synced at 

`UTC Time:` {{ (call .time.Parse .app.status.operationState.finishedAt).UTC.Format "02-January-2006 03:04pm" }}.
`Cuban Time:` {{ ((call .time.Parse .app.status.operationState.finishedAt).In (call .time.LoadLocation "America/Havana")).Format "02-January-2006 03:04pm" }}.

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