OSCAP_DATASTREAM environment variable fix.

Description

Created in response to this:

• https://chat.il2.dso.mil/iron-bank/pl/p5w93gjnujngpm7gqpmme59rdo

Pipelines:

• https://code-ib-mario.staging.dso.mil/dsop/canonical/ubuntu/pro-cis-stig-22.04/ubuntu-pro-cis-stig-22.04/-/pipelines
• https://code-ib-mario.staging.dso.mil/dsop/docker/scratch/-/pipelines/77128
• https://code-ib-mario.staging.dso.mil/dsop/suse/bci/bci-base/-/pipelines/77137
• https://repo1.dso.mil/dsop/redhat/ubi/9.x/ubi9-minimal/-/pipelines/3611803
• https://repo1.dso.mil/dsop/bitnami/mysql8/-/pipelines/3611817