Change in vdsm[master]: API: allow setLogLevel to tune a specific logger

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Change subject: API: allow setLogLevel to tune a specific logger
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Patch Set 11:

* Update tracker::IGNORE, no Bug-Url found
* Check Bug-Url::WARN, no bug url found, make sure header matches 'Bug-Url: ' and is a valid url.
* Check merged to previous::IGNORE, Not in stable branch (['ovirt-3.5', 'ovirt-3.4', 'ovirt-3.3'])