The Atlantic Condos of Atlanta have been through some rough waters in recent years, as the Atlanta condo market worked to absorb huge amounts of inventory that came on the market just as conditions started to worsen.  Now it looks like the remaining 324 never-before-lived-in condos are going to be available immediately for lease.   The new owner, Midtown Residences LLC, has decided to capitalize on the booming rental market while delaying sales until the market turns.