Mask passwords when written as json

[objectiser]

Signed-off-by: Gary Brown gary@brownuk.com

Which problem is this PR solving?

Ensure that passwords are not accidentally written out as json.

Short description of the changes

Don't serialize the password fields as json.

[yurishkuro]

Feels like there's got to be a more reliable way.

[codecov]

Codecov Report

Merging #2302 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2302      +/-   ##
==========================================
- Coverage   96.23%   96.21%   -0.02%     
==========================================
  Files         218      218              
  Lines       10692    10692              
==========================================
- Hits        10289    10287       -2     
- Misses        347      350       +3     
+ Partials       56       55       -1     

Impacted Files	Coverage Δ
...lugin/sampling/strategystore/adaptive/processor.go	99.20% <0.00%> (-0.80%)	⬇️
plugin/storage/badger/spanstore/reader.go	96.79% <0.00%> (ø)

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