added validation for transaction uuid

[maurafortino]

Fixes: https://github.com/comcast-cl/xmidt/issues/571

[codecov[bot]]

Codecov Report

Merging #134 (fc2dc49) into main (3855006) will increase coverage by 0.09%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #134      +/-   ##
==========================================
+ Coverage   47.69%   47.79%   +0.09%     
==========================================
  Files          24       24              
  Lines        4344     4352       +8     
==========================================
+ Hits         2072     2080       +8     
  Misses       2087     2087              
  Partials      185      185              

Flag	Coverage Δ
unittests	47.79% <100.00%> (+0.09%)	:arrow_up:

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

Files Changed	Coverage Δ
messages.go	96.99% <100.00%> (ø)
messagetype.go	95.12% <100.00%> (ø)
wrphttp/handler.go	100.00% <100.00%> (ø)