Deploy configmaps with the chart

[lyz-code]

Several cronjobs require a configuration file.

With the current chart, we need to deploy the configmap manually and use it in the chart.

It will be nice if the chart is able to create the configmap from a list of files.

I have no experience with chart development, but if you agree on the feature I can try to implement it

[DrPsychick]

@lyz-code : I had the need for a similar use case and created a cronjobs chart and included ConfigMap and Secret support. Let me know what you think. Maybe @bambash would also be interested and we can add it to this chart too.

https://github.com/DrPsychick/charts

[lyz-code]

Looks wonderful @DrPsychick please do a PR, I think @bambash will like it too