Improve error handling when stop a scan.

[jjnicola]

No description provided.

[codecov]

Codecov Report

Merging #163 into ospd-2.0 will decrease coverage by 0.11%.
The diff coverage is 0%.

@@             Coverage Diff             @@
##           ospd-2.0    #163      +/-   ##
===========================================
- Coverage     68.62%   68.5%   -0.12%     
===========================================
  Files            12      12              
  Lines          1756    1759       +3     
===========================================
  Hits           1205    1205              
- Misses          551     554       +3

Impacted Files	Coverage Δ
ospd/ospd.py	72.95% <0%> (-0.29%)	⬇️

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