Race condition during init_host

[Kravchenko Pavel]

When compute service starts it checks whether managed instances been evacuated to another host (in
manager._destroy_evacuated_instances). The time between this check and when service appears to be active via servicegroup is a time when instance can be evacuated to another host which will lead to multiple instances running from same disk on different hosts.

[Kravchenko Pavel (kravchenko-pavel)]

Fix proposed https://review.openstack.org/#/c/45883/

[Joe Gordon (jogo)]

Fix was abandoned

[Markus Zoeller (markus_z) (mzoeller)]

This is an automated cleanup. This bug report has been closed because it
is older than 18 months and there is no open code change to fix this.
After this time it is unlikely that the circumstances which lead to
the observed issue can be reproduced.

If you can reproduce the bug, please:
* reopen the bug report (set to status "New")
* AND add the detailed steps to reproduce the issue (if applicable)
* AND leave a comment "CONFIRMED FOR: <RELEASE_NAME>"
  Only still supported release names are valid (LIBERTY, MITAKA, OCATA, NEWTON).
  Valid example: CONFIRMED FOR: LIBERTY