twistlock update to 0.15.0-bb.6

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/twistlock/-/blob/0.15.0-bb.6/CHANGELOG.md

Package MR

big-bang/product/packages/twistlock!153 (merged)

For Issue

Closes big-bang/product/packages/twistlock#110 (closed)

Upgrade Notices

N/A