Sample summary search returns error if only one barcode fails

[colts661]

During the sample summary search, the CSV option gives an option for users to upload several barcodes. However, if one of the barcodes fails to be found, the entire search aborts with the error message "Not Found" showed. @cassidysymons

Observation: When looping through the barcodes in admin.sample_summary.per_sample(), this line creates the early stopping condition that ends the entire function.