Fix Tests

[BreadGenie]

There was a mismatch in the way datetime was imported in c6d71c6 and 585e578 in the test_output_engine.py file leading to failing tests

[BreadGenie]

I have noticed long test failing in c6d71c6 but the NVD server seems down at the moment to check properly

[BreadGenie]

Seems like c6d71c6 doesn't work when we provide -u never and tool crashes with a AttributeError: 'CVEDB' object has no attribute 'time_of_last_update'

[codecov-commenter]

Codecov Report

Merging #1175 (b37b668) into main (10cb6fd) will increase coverage by 0.21%.
The diff coverage is 60.86%.

@@            Coverage Diff             @@
##             main    #1175      +/-   ##
==========================================
+ Coverage   83.96%   84.18%   +0.21%     
==========================================
  Files         186      199      +13     
  Lines        3212     3528     +316     
  Branches      351      412      +61     
==========================================
+ Hits         2697     2970     +273     
- Misses        432      455      +23     
- Partials       83      103      +20     

Flag	Coverage Δ
longtests	84.18% <60.86%> (+0.21%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cve_bin_tool/checkers/avahi.py	100.00% <ø> (ø)
cve_bin_tool/checkers/bash.py	100.00% <ø> (ø)
cve_bin_tool/checkers/bind.py	100.00% <ø> (ø)
cve_bin_tool/checkers/binutils.py	100.00% <ø> (ø)
cve_bin_tool/checkers/busybox.py	100.00% <ø> (ø)
cve_bin_tool/checkers/bzip2.py	100.00% <ø> (ø)
cve_bin_tool/checkers/cups.py	100.00% <ø> (ø)
cve_bin_tool/checkers/curl.py	100.00% <ø> (ø)
cve_bin_tool/checkers/dnsmasq.py	100.00% <ø> (ø)
cve_bin_tool/checkers/dovecot.py	100.00% <ø> (ø)
... and 118 more

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