test: pull image before using it

[fuweid]

Signed-off-by: Wei Fu fuweid89@gmail.com

Ⅰ. Describe what this PR did

The case maybe run by name. If we don't pull image before, the case will
fail. Each case should do their own setup job.

Ⅱ. Does this pull request fix one issue?

none

Ⅲ. Why don't you add test cases (unit test/integration test)? (你真的觉得不需要加测试吗？)

no need

Ⅳ. Describe how to verify it

CI

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@0905abb). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #2751   +/-   ##
=========================================
  Coverage          ?   69.38%           
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  Files             ?      277           
  Lines             ?    17412           
  Branches          ?        0           
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  Hits              ?    12082           
  Misses            ?     4010           
  Partials          ?     1320

Flag	Coverage Δ
#criv1alpha2_test	39.37% <ø> (?)
#integration_test_0	36.56% <ø> (?)
#integration_test_1	35.8% <ø> (?)
#integration_test_2	36.51% <ø> (?)
#integration_test_3	35.53% <ø> (?)
#node_e2e_test	35.29% <ø> (?)
#unittest	28.51% <ø> (?)

[rudyfly]

LGTM