Resolve "Mattermost Support for Tolerations"

Package Merge Request

Package Changes

Added code to support tolerations.

Package MR

https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost/-/merge_requests/78

For Issue

Closes https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost/-/issues/13

BB Processes

Closes #953 (closed)