enable external data flag for helm

[sozercan]

Signed-off-by: Sertac Ozercan [email protected]

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 #

Special notes for your reviewer:

[codecov-commenter]

Codecov Report

Merging #1633 (866bab6) into master (c2844a6) will increase coverage by 0.19%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1633      +/-   ##
==========================================
+ Coverage   52.66%   52.86%   +0.19%     
==========================================
  Files         100      100              
  Lines        8540     8540              
==========================================
+ Hits         4498     4515      +17     
+ Misses       3684     3669      -15     
+ Partials      358      356       -2     

Flag	Coverage Δ
unittests	52.86% <ø> (+0.19%)	⬆️

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

Impacted Files	Coverage Δ
pkg/controller/config/config_controller.go	65.04% <0.00%> (ø)
pkg/watch/replay.go	81.25% <0.00%> (+2.27%)	⬆️
...onstrainttemplate/constrainttemplate_controller.go	60.71% <0.00%> (+3.09%)	⬆️

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[maxsmythe]

LGTM