proxies / iad2: memory to 16g
    
    proxy01/10 were bumped to 16gb a while back, so make sure the ansible
    host vars match that.
    
    proxy101/110 (the internal ones used by hosts inside iad2) had only 8g
    and were looking pretty loaded. So, bump them up to 16gb as well in
    ansible. I already manually increased them to 16g, but this way if we
    reinstall them they will be correct.
    
    Signed-off-by: Kevin Fenzi <kevin@scrye.com>