improved coverage for varnish

[SinghHrmn]

No description provided.

[codecov-io]

Codecov Report

Merging #601 into master will increase coverage by 0.20%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #601      +/-   ##
==========================================
+ Coverage   84.20%   84.40%   +0.20%     
==========================================
  Files          63       63              
  Lines        2494     2494              
  Branches      497      497              
==========================================
+ Hits         2100     2105       +5     
+ Misses        270      266       -4     
+ Partials      124      123       -1     

Flag	Coverage Δ
#longtests	84.40% <ø> (+0.20%)	⬆️

Impacted Files	Coverage Δ
test/test_scanner.py	93.15% <ø> (ø)
cve_bin_tool/checkers/varnish.py	100.00% <0.00%> (+27.77%)	⬆️

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