The Tennessee government has agreed to begin scrubbing its sex offender registry of dozens of people who were convicted of prostitution while having HIV, reversing a practice that federal lawsuits have challenged as draconian and discriminatory. For more than three decades, Tennessee’s “aggravated prostitution” laws have made prostitution a misdemeanor for most sex workers but a felony for those who are HIV-positive. Tennessee toughened penalties in 2010 by reclassifying prostitution with HIV as a “violent sexual offense” with a lifetime registration as a sex offender — even if protection is u…