Provision image upload timeout
Provision image upload timeout

Changes:
    - Add IMAGE_UPLOAD_WAIT_TIMEOUT and default to 4 minutes

Usage:
   User can specify -v IMAGE_UPLOAD_WAIT_TIMEOUT:10

Change-Id: I53e52213bf5215b714aaf7441c7bdcad1773d613
Signed-off-by: George Keishing <bef0a9ecac45fb57611777c8270153994e13fd2e@in.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation