MetaDataBuilder

[pnrobinson]

Add factory method that takes a time stamp This would enable us to simplify calls like this

 return  MetaData.newBuilder()
                    .setCreated(createdOn)
                    .setCreatedBy(createdBy)
                    .addAllUpdates(updates)
                    .addResources(Resources.hpoVersion(hpoVersion))
                    .build();

[pnrobinson]

Added this

   public static MetaDataBuilder builder(String createdBy) {
        Instant time = Instant.now();
        Timestamp timestamp = Timestamp.newBuilder().setSeconds(time.getEpochSecond())
                .setNanos(time.getNano()).build();
        return new MetaDataBuilder(timestamp, createdBy);
    }