Support of securityContext

[dashcheulov]

Hi, I would like to run containers under non root user and managed to do it adding

securityContext:
  runAsGroup: 1000
  runAsUser: 1000

to spec.template.spec of deployments. The chart doesn't support it.
Please, add section securityContext to the templates of deployments.

[cheshi-mantu]

hi @dashcheulov
these are to be submitted via https://support.qameta.io