Dev: qdevice: Reload corosync configuration on one node

[liangxin1300]

No need to reload on all nodes, corosync-cfgtool -R will do it for us.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.61%. Comparing base (4eb69e1) to head (64a4d21).
Report is 3 commits behind head on master.

Additional details and impacted files

Flag	Coverage Δ
integration	55.06% <100.00%> (-0.01%)	⬇️
unit	52.98% <100.00%> (ø)

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Files with missing lines	Coverage Δ
crmsh/qdevice.py	98.04% <100.00%> (ø)

... and 2 files with indirect coverage changes

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