Trim baggage key when parsing

[lastchiliarch]

Signed-off-by: lastchiliarch lastchiliarch@gmail.com

Which problem is this PR solving?

• Trim baggage key in parseCommaSeparatedMap，see trimming space in parseCommaSeparatedMap #271

Short description of the changes

• Trim baggage key when parseing

[codecov]

Codecov Report

Merging #566 (5b44292) into master (0dab782) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #566   +/-   ##
=======================================
  Coverage   90.49%   90.49%           
=======================================
  Files          24       24           
  Lines        1663     1663           
=======================================
  Hits         1505     1505           
  Misses        109      109           
  Partials       49       49           

Impacted Files	Coverage Δ
propagation.go	71.85% <100.00%> (ø)

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[yurishkuro]

thanks!