Change in vdsm[ovirt-4.1]: he_upgrade: add commands for 3.5 -> 3.6 upgrade with jsonrpc

[Code Review]

From Dan Kenigsberg :

Dan Kenigsberg has posted comments on this change.

Change subject: he_upgrade: add commands for 3.5 -> 3.6 upgrade with jsonrpc
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Patch Set 2: Code-Review+1

The patch is so simple, that I'd take it in, even though the bug is not marked as an exception.