Fix: cibverify: If no errors found, treat crm_verify result as success (bsc#1250349)

[liangxin1300]

Port from #1926

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 70.56%. Comparing base (cf4386e) to head (d62de2c).

Additional details and impacted files

Flag	Coverage Δ
integration	55.00% <100.00%> (+0.03%)	:arrow_up:
unit	52.92% <16.66%> (-0.01%)	:arrow_down:

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Files with missing lines	Coverage Δ
crmsh/cibverify.py	95.65% <100.00%> (+1.53%)	:arrow_up:

... and 1 file with indirect coverage changes

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