update-EC2-netblocks: pass dry_run, not options.dry_run
update-EC2-netblocks: pass dry_run, not options.dry_run

Devyani-Divs/mirrormanager2,pombredanne/mirrormanager2,pombredanne/mirrormanager2,Devyani-Divs/mirrormanager2,pombredanne/mirrormanager2,Devyani-Divs/mirrormanager2,Devyani-Divs/mirrormanager2,pombredanne/mirrormanager2