AUTHORS: Update entry for Thomas Graf

Signed-off-by: Thomas Graf <tgraf@noironetworks.com>
Signed-off-by: Justin Pettit <jpettit@nicira.com>
ovs-vsctl: Fix OF protocol name capitalization in manual page

Signed-off-by: Thomas Graf <tgraf@noironetworks.com>
Signed-off-by: Justin Pettit <jpettit@nicira.com>