DAOS-16670 test: container/multiple_delete.py - Increase SCM leftover…

[shimizukko]

…… (#15420)

The object placement algorithm was changed by DAOS-16445. As a result, data are written to targets more uniformly while the amount of leftover data after container destroy/garbage collection in each target remains the same. i.e., Data are written to more targets while the cleanup method in each target hasn't been improved, which results in higher aggregate leftover data.

To handle larger amount of leftover data in SCM, increase the threshold to 1.5MB.

Skip-unit-tests: true
Skip-fault-injection-test: true
Skip-func-hw-test-medium-md-on-ssd: false
Test-tag: test_multiple_container_delete
Test-repeat: 3

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[github-actions]

Ticket title is 'container/multiple_delete.py:MultipleContainerDelete.test_multiple_container_delete - SCM space wasn't recovered!'
Status is 'In Review'
Labels: 'ci_master_weekly,weekly_test,ci_2.6_weekly'
https://daosio.atlassian.net/browse/DAOS-16670