fix curl image used for e2e

[ritazh]

Signed-off-by: Rita Zhang rita.z.zhang@gmail.com

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, using fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when the PR gets merged):
Fixes #

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[codecov-commenter]

Codecov Report

Merging #1321 (d92e1a2) into master (e09498c) will decrease coverage by 0.10%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1321      +/-   ##
==========================================
- Coverage   48.67%   48.56%   -0.11%     
==========================================
  Files          68       68              
  Lines        4890     4890              
==========================================
- Hits         2380     2375       -5     
- Misses       2161     2164       +3     
- Partials      349      351       +2     

Flag	Coverage Δ
unittests	48.56% <ø> (-0.11%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...roller/assignmetadata/assignmetadata_controller.go	48.33% <0.00%> (-1.67%)	⬇️
...onstrainttemplate/constrainttemplate_controller.go	56.31% <0.00%> (-0.98%)	⬇️

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[maxsmythe]

LGTM