Don't disable SC2046 shellcheck for docker run command

Summary:
Reported upstream at https://github.com/koalaman/shellcheck/issues/1161

Fixed at https://github.com/koalaman/shellcheck/commit/08d2eef4111afde4

Test Plan: shellcheck roles/paas-docker/wrappers/files/phpbb.sh

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D1554