Fix issues with java docker building

[achals]

Signed-off-by: Achal Shah achals@gmail.com

What this PR does / why we need it:
The docker image build on master is currently broken.

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

none

[codecov-commenter]

Codecov Report

Merging #2178 (ea55ee2) into master (068389d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2178   +/-   ##
=======================================
  Coverage   84.59%   84.59%           
=======================================
  Files         102      102           
  Lines        8186     8186           
=======================================
  Hits         6925     6925           
  Misses       1261     1261           

Flag	Coverage Δ
integrationtests	74.26% <ø> (-0.29%)	⬇️
unittests	59.01% <ø> (ø)

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[adchia]

/lgtm

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: achals, adchia, woop

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