[Acceptance][8.0] OSTF 'Launch instance with file injection' failed in test remove_controllers

[Vladimir Jigulin]

Reproduced on CI: https://patching-ci.infra.mirantis.net/job/8.0.acceptance.ubuntu.ha_scale_group_2/4/testReport/(root)/remove_controllers/remove_controllers/

Steps to reproduce:
1. Create cluster
2. Add 3 controller, 1 compute
3. Deploy the cluster
4. Remove 2 controllers
5. Deploy changes
6. Run OSTF

or use remove_controllers test from fuel-qa
test fail at line: https://github.com/openstack/fuel-qa/blob/stable/8.0/fuelweb_test/tests/tests_scale/test_scale_group_2.py#L165

Expected results:
Should fail 1 OSTF test

Actual result:
Failed 2 OSTF tests;. Names of failed tests:
- Check that required services are running (failure) Some nova services have not been started.
- Launch instance with file injection (failure) Execution command on Instance fails with unexpected result.

Reproducibility: rarely

Snapshot: https://drive.google.com/file/d/0Bw7ZahkM7_sJRWhEYjIyWkFlNE0/view?usp=sharing

[Bug Checker Bot (bug-checker)]

(This check performed automatically)
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[Alexey Stupnikov (astupnikov)]

Recent tempest tests are working correctly and reported error didn't rise again. Closing bug as Invalid as it looks like a temporary problem with testing env solved by its reset.