update default session-id-header for tags-http-exporter

[EddeCCC]

This change is 

[codecov]

Codecov Report

Merging #1620 (37d8cfb) into master (61429e4) will decrease coverage by 0.02%.
The diff coverage is 35.00%.

❗ Current head 37d8cfb differs from pull request most recent head 48043ec. Consider uploading reports for the commit 48043ec to get more accurate results

@@             Coverage Diff              @@
##             master    #1620      +/-   ##
============================================
- Coverage     78.39%   78.37%   -0.02%     
- Complexity     2518     2519       +1     
============================================
  Files           257      257              
  Lines          8247     8256       +9     
  Branches        983      984       +1     
============================================
+ Hits           6465     6470       +5     
- Misses         1355     1359       +4     
  Partials        427      427              

Files	Coverage Δ
...ntation/browser/BrowserPropagationDataStorage.java	89.29% <100.00%> (+0.40%)	⬆️
...on/context/propagation/BrowserPropagationUtil.java	58.82% <50.00%> (ø)
...xporter/BrowserPropagationHttpExporterService.java	36.96% <0.00%> (ø)
...celot/core/exporter/BrowserPropagationServlet.java	93.33% <44.44%> (-1.03%)	⬇️
...tion/browser/BrowserPropagationSessionStorage.java	67.74% <0.00%> (-10.04%)	⬇️

... and 1 file with indirect coverage changes

[TitusLabs]

Reviewed 3 of 7 files at r1, 7 of 7 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @EddeCCC)