Change in vdsm[master]: Group the cluster lock code into a new SP method

[Dan Kenigsberg]

Dan Kenigsberg has submitted this change and it was merged.

Change subject: Group the cluster lock code into a new SP method
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Group the cluster lock code into a new SP method

Both the create and reconstructMaster methods were sharing a very
similar code for temporarly acquiring the cluster lock.

Change-Id: I981d84af7816ccd2db64eb5beb440e9f7637f734
---
M vdsm/storage/safelease.py
M vdsm/storage/sd.py
M vdsm/storage/sp.py
3 files changed, 36 insertions(+), 25 deletions(-)

Approvals:
  Federico Simoncelli: Verified
  Dan Kenigsberg: Looks good to me, approved
  Igor Lvovsky: Looks good to me, but someone else must approve


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Gerrit-MessageType: merged
Gerrit-Change-Id: I981d84af7816ccd2db64eb5beb440e9f7637f734
Gerrit-PatchSet: 6
Gerrit-Project: vdsm
Gerrit-Branch: master
Gerrit-Owner: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Dan Kenigsberg <danken(a)redhat.com&gt;
Gerrit-Reviewer: Eduardo <ewarszaw(a)redhat.com&gt;
Gerrit-Reviewer: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;