If user sets debug mode, the command push should only show the debug log
information. If the stdout is with flush by the progress status, it is
hard to see the debug log.
Signed-off-by: Wei Fu <fuweid89@gmail.com>
For missing required parameters adds error return before attempting any
actions to `ctr images` commands.
Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com>
