FLOWERY BRANCH – The Atlanta Falcons are gearing up for rookie minicamp this weekend after a flurry of player moves over the last several weeks. General manager Ian Cunningham is not finished making changes to his roster, and the front office has reunited with another former player.  According to a press release from the team, the Falcons have signed cornerback Darren Hall and released safety Tysheem Johnson in a corresponding move.  Hall was originally selected by the franchise in the fourth round (108th overall) of the 2021 NFL Draft out of San Diego State.…