Change in vdsm[ovirt-3.5]: WIP profiling: memory: port from dowser to tracemalloc

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Change subject: WIP profiling: memory: port from dowser to tracemalloc
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Patch Set 2: Verified-1

* Update tracker::IGNORE, no Bug-Url found

* Check Bug-Url::ERROR, At least one bug-url is required for the stable branch
* Check merged to previous::WARN, Still missing on branches master, ovirt-3.6