RACHEL RASKIN-ZRIHEN Janet “JJ” Johnson is passing her beauty salon — Napa’s Hair Odyssey — down to her coworker, the same way the business was passed down to her by the previous owners. Karina Gaspar officially took over the Lincoln Avenue salon on Jan. 1. It’s a matter of paying it forward, Johnson said. A native of a small Minnesota town, Johnson had been a dance instructor and worked in the sheriff’s department’s criminal records division before landing on cosmetology as her career, she said. “I wanted to make a move to be more independent on my own,” she said. “I was considering options for careers.” Johnson said that though…