The size of the metal3.io image has increased, and timeouts sometimes
occur within the 1000s range. This change enables overriding the wait
timeout for the initinfra phase on the ephemeral node and increases the
timeout to 2000s by default.
Change-Id: I11d7cdcfa0f7982c68cc7223f52ab20007bca69d
Signed-off-by: Drew Walters <andrew.walters@att.com>