Change in vdsm[master]: utils: add custom closing context manager

[Code Review]

From Yaniv Bronhaim <ybronhei(a)redhat.com&gt;:

Yaniv Bronhaim has posted comments on this change.

Change subject: utils: add custom closing context manager
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Patch Set 7: Code-Review+1

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Gerrit-MessageType: comment
Gerrit-Change-Id: I29e9ed0f44603dd5299be5e3b814d08833055a94
Gerrit-PatchSet: 7
Gerrit-Project: vdsm
Gerrit-Branch: master
Gerrit-Owner: Irit Goihman <igoihman(a)redhat.com&gt;
Gerrit-Reviewer: Dan Kenigsberg <danken(a)redhat.com&gt;
Gerrit-Reviewer: Francesco Romani <fromani(a)redhat.com&gt;
Gerrit-Reviewer: Irit Goihman <igoihman(a)redhat.com&gt;
Gerrit-Reviewer: Jenkins CI
Gerrit-Reviewer: Nir Soffer <nsoffer(a)redhat.com&gt;
Gerrit-Reviewer: Piotr Kliczewski <piotr.kliczewski(a)gmail.com&gt;
Gerrit-Reviewer: Yaniv Bronhaim <ybronhei(a)redhat.com&gt;
Gerrit-Reviewer: gerrit-hooks <automation(a)ovirt.org&gt;
Gerrit-HasComments: No