[RFE] Breakdown workload configmaps into different files

[rsevilla87]

The current workload templates has ConfigMaps that embed all logic. This makes difficult to read and contribute to them.
For example this template https://github.com/openshift-scale/workloads/blob/master/workloads/templates/workload-mastervertical-script-cm.yml.j2 embeds run.sh, conprof_start.sh, conprof_stop.sh, workload.sh and all clusterloader templates.

With the current approach there're duplicated code (for example conprof_start.sh is present in other templates).

As an idea to avoid this we could use the command kubectl create cm --from-file=... to create on-fly the ConfigMaps from the scripts required by the workload.