Enable batch mode for devel/upload
Enable batch mode for devel/upload

Since the rsync/ssh calls are done in parallel, they can't read properly a
password or confirmation about keys from stdin. As such, it's better to enable
batch mode so that they fail right away instead of prompting and then timing
out after a long while.

Signed-off-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>
Reviewed-by: Michael Hanselmann <68b67885ff74281219b4a4be33cc20fd45078d7c@google.com>

andir/ganeti,andir/ganeti,andir/ganeti,bitemyapp/ganeti,dimara/ganeti,grnet/snf-ganeti,yiannist/ganeti,onponomarev/ganeti,ganeti/ganeti,ganeti-github-testing/ganeti-test-1,ganeti/ganeti,yiannist/ganeti,bitemyapp/ganeti,leshchevds/ganeti,dimara/ganeti,leshchevds/ganeti,mbakke/ganeti,mbakke/ganeti,apyrgio/ganeti,apyrgio/snf-ganeti,apyrgio/snf-ganeti,grnet/snf-ganeti,mbakke/ganeti,apyrgio/ganeti,ganeti/ganeti,onponomarev/ganeti,ganeti-github-testing/ganeti-test-1,yiannist/ganeti,leshchevds/ganeti