* [docker_image_ctl.j2]: swss docker initialization improvements
This commit attempts to address the following:
* Make sure swss container is indeed up and running before running any commands
on it. In case where swss container is not fully up when swss.sh attempts to
create swss:/ready file using "docker exec swss$DEV touch", the command can
fail silently and can cause swssconfig to wait forever leading to missing IP
decap configuration among other things. Add a wait so that docker commands
are run only after swss container status is "Running"
* Add a log when swss:/ready file is created or if the file creation fails so
that it becomes easier to debug such scenarios in the future
* [docker_image_ctl.j2]: Use swss$DEV to accommodate multi ASIC platforms as well
Signed-off-by: Prabhat Aravind <paravind@microsoft.com>
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