fix goimports error in test.pb.go file.

[rghetia]

fixes #247

• modified generate.sh to run goimports on generated file.
• added additional line before generated comment to fix golint error in test.pb.go

[codecov-io]

Codecov Report

Merging #248 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #248   +/-   ##
=======================================
  Coverage   73.22%   73.22%           
=======================================
  Files          14       14           
  Lines        1621     1621           
=======================================
  Hits         1187     1187           
  Misses        358      358           
  Partials       76       76

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