Fix for Issue#11 increase test coverage for jaeger-jaxrs2 tests

[kevinearls]

Cf. #11

[CLAassistant]

All committers have signed the CLA.

[codecov-io]

Codecov Report

Merging #162 into master will increase coverage by 0.22%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             master    #162      +/-   ##
===========================================
+ Coverage     80.68%   80.9%   +0.22%     
  Complexity      460     460              
===========================================
  Files            77      77              
  Lines          1786    1786              
  Branches        208     208              
===========================================
+ Hits           1441    1445       +4     
+ Misses          256     252       -4     
  Partials         89      89

Impacted Files	Coverage Δ	Complexity Δ
...a/com/uber/jaeger/filters/jaxrs2/ServerFilter.java	95% <0%> (+10%)	7% <0%> (ø)	⬇️

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[yurishkuro]

Thanks, @kevinearls