host-deploy: node-upgrade: apply artificial eof for vdsm-upgrade

apply artificial end-of-file.

there is no way in java to use non blocking
InputStream.

there is no way to interrupt the blocking.

and we cannot terminate thread as the connection
pool will get messy.

so we should detect eof based on data.

Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1080594
Change-Id: I093357933d2f10c0d90864f53977b832a58dafbd
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>