Entrypoint doesn't work when using CMD in shell form

docker-entrypoint.sh tries to detect if asadmin is ran in CMD with the following test : 
``
"$1" = 'asadmin'
``

According to the [documentation](https://docs.docker.com/engine/reference/builder/#understand-how-cmd-and-entrypoint-interact), this doesn't work when using CMD in shell form since the resulting command will be:
``
exec_entry p1_entry /bin/sh -c exec_cmd p1_cmd
``
