Mattermost Resource Request and Limits

Package MR

• Sets users to null by default and replicas to 1
• Adds resource requests and limits to all containers

https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost/-/merge_requests/51

Also including a fix for default bucket creation already existing

https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost/-/merge_requests/52

Issues

Closes https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost/-/issues/2 https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/issues/86 https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/issues/87