Some large investments in N.L. production have gone up in smoke As Brian Keating pulls the plastic lid off a small cannabis storage container, a pungent herbal smell wafts quickly throughout the room. "That's quality," said Keating, referring to the highly potent buds as he waved his hand over the container. This cannabis, though, is not for sale. These samples — destined for mandatory storage, as per Health Canada rules — are all that's left…