define a handler to manage a container
define a handler to manage a container

Define a handler to store the resource informations for the container.
That allows to factor out some code and will help to encapsulate a
little more the 'start' code which is too big.

Signed-off-by: Daniel Lezcano <3211518dd4d87cb3f7ee12cb52e14b7fb2bc0446@fr.ibm.com>

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