ciao-controller: workloads: change docker ubuntu latest workload
ciao-controller: workloads: change docker ubuntu latest workload

The latest ubuntu image does not support python3. Change the cloud
init to a simple bash script which does an infinite loop so that
the container can be verified as running for test purposes.

Signed-off-by: Kristen Carlson Accardi <047ff8258f0113ece56e5e2fe9e0d987b14c4333@linux.intel.com>

markdryan/ciao,leoswaldo/ciao,obedmr/ciao,erick0z/ciao,mrkz/ciao,wcwxyz/ciao,kaccardi/ciao,kaccardi/ciao,01org/ciao,rbradford/ciao,tpepper/ciao,jorgevgut/ciao,mcastelino/ciao,mcastelino/ciao,matthewrsj/ciao,obedmr/ciao,leoswaldo/ciao,erick0z/ciao,mrkz/ciao,leoswaldo/ciao,jorgevgut/ciao,jorgevgut/ciao,tpepper/ciao,rbradford/ciao,erick0z/ciao,markdryan/ciao,ciao-project/ciao,wcwxyz/ciao,ciao-project/ciao,obedmr/ciao,matthewrsj/ciao,wcwxyz/ciao,01org/ciao,tpepper/ciao,mcastelino/ciao,matthewrsj/ciao,mrkz/ciao