Support --namespace with service-account with score-k8s 0.5.2

[mathieu-benoit]

Take into account --namespace based on score-spec/score-k8s#183 since score-k8s version 0.5.2.

Note: if these new versions of these patch templates are used with score-k8s version < 0.5.2, this error message below will happen with score-k8s generate:

Error: failed to patch template 1: failed to execute template: template: :1:17: executing "" at <.Namespace>: can't evaluate field Namespace in type patching.patchTemplateInput