DAOS-17241 test: reset timeout in dmg command util (#16210)

[jamesanunez]

Always reset the timeout in DmgCommand in dmg utilities no matter the outcome of storage format.

Steps for the author:

• [ ] Commit message follows the guidelines.
• [ ] Appropriate Features or Test-tag pragmas were used.
• [ ] Appropriate Functional Test Stages were run.
• [ ] At least two positive code reviews including at least one code owner from each category referenced in the PR.
• [ ] Testing is complete. If necessary, forced-landing label added and a reason added in a comment.

After all prior steps are complete:

• [ ] Gatekeeper requested (daos-gatekeeper added as a reviewer).

[github-actions[bot]]

Ticket title is 'Control/dmg_system_reformat.py failed due to pool create return -15 error' Status is 'Awaiting backport' Labels: 'scrubbed_2.6.5,scrubbed_2.8,testp2,weekly_test' Job should run at elevated priority (1) https://daosio.atlassian.net/browse/DAOS-17241

[daosbuild3]

Test stage Functional Hardware Large completed with status FAILURE. https://jenkins-3.daos.hpc.amslabs.hpecorp.net//job/daos-stack/job/daos/view/change-requests/job/PR-16688/4/execution/node/1411/log