chore: fix JDK Travis failures

[codecov[bot]]

Codecov Report

Merging #127 into master will decrease coverage by 0.00%. The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #127      +/-   ##
============================================
- Coverage     49.29%   49.28%   -0.01%     
  Complexity       38       38              
============================================
  Files             5        5              
  Lines           213      211       -2     
  Branches         16       16              
============================================
- Hits            105      104       -1     
+ Misses          104      103       -1     
  Partials          4        4              

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/com/sendgrid/Client.java	34.28% <0.00%> (-0.23%)	12.00% <0.00%> (ø%)

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[thinkingserious]

Hello @childish-sambino,

Thanks again for the PR!

We appreciate your contribution and look forward to continued collaboration. Thanks!

Team SendGrid DX