Description of problem:

We are get false failures on test 007_sd_reattach.deactivate_storage_domain. 
the test fails because we are trying to deactivate a domain with running tasks. 

Since this is a known issue I am opening a bug to fix the test and prevent false failures. 

Here is the latest build: 
http://jenkins.ovirt.org/job/ovirt-master_change-queue-tester/5076/


018-01-24 09:12:01,070-05 WARN  [org.ovirt.engine.core.bll.storage.domain.DeactivateStorageDomainWithOvfUpdateCommand] (default task-30) [87107c27-275d-4fee-a456-013615e817cc] Validation of action 'DeactivateStorageDomainWithOvfUpdate' f
ailed for user admin@internal-authz. Reasons: VAR__TYPE__STORAGE__DOMAIN,VAR__ACTION__DEACTIVATE,ERROR_CANNOT_DEACTIVATE_DOMAIN_WITH_TASKS
2018-01-24 09:12:01,071-05 INFO  [org.ovirt.engine.core.bll.storage.domain.DeactivateStorageDomainWithOvfUpdateCommand] (default task-30) [87107c27-275d-4fee-a456-013615e817cc] Lock freed to object 'EngineLock:{exclusiveLocks='[2b834f56-9
469-4c01-98bf-531d41812fe4=STORAGE]', sharedLocks='[3e20e50b-4536-4f03-9bd3-7f02d321e734=POOL]'}'
2018-01-24 09:12:01,075-05 DEBUG [org.ovirt.engine.core.common.di.interceptor.DebugLoggingInterceptor] (default task-30) [87107c27-275d-4fee-a456-013615e817cc] method: runAction, params: [DeactivateStorageDomainWithOvfUpdate, DeactivateSt
orageDomainWithOvfUpdateParameters:{commandId='df244508-5d1c-4485-82e6-11bc426072bc', user='null', commandType='Unknown'}], timeElapsed: 70ms
2018-01-24 09:12:01,079-05 ERROR [org.ovirt.engine.api.restapi.resource.AbstractBackendResource] (default task-30) [] Operation Failed: [Cannot deactivate Storage while there are running tasks on this Storage.
-Please wait until tasks will finish and try again.]