Update Vault init securityContext

Package Merge Request

Package Changes

Adds the security context for the vault init job.

Package MR

https://repo1.dso.mil/platform-one/big-bang/apps/sandbox/vault/-/merge_requests/12

https://repo1.dso.mil/platform-one/big-bang/apps/sandbox/vault/-/tags/0.16.1-bb.2