Add label to bats http.send test for idempotence

[font]

Signed-off-by: Ivan Font ifont@redhat.com

What this PR does / why we need it:
The bats tests rely on common labels to cleanup the test resources such as constrainttemplates that are created throughout the bats tests. This particular CT was missing that common label and as a result was not being deleted at the end. This now adds the label so the bats tests can remain idempotent.

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):
Ref #1119.

Special notes for your reviewer:

[codecov-commenter]

Codecov Report

Merging #1473 (95aa5e0) into master (821db67) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1473      +/-   ##
==========================================
+ Coverage   52.06%   52.07%   +0.01%     
==========================================
  Files          83       83              
  Lines        7593     7593              
==========================================
+ Hits         3953     3954       +1     
+ Misses       3260     3259       -1     
  Partials      380      380              

Flag	Coverage Δ
unittests	52.07% <ø> (+0.01%)	⬆️

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

Impacted Files	Coverage Δ
...onstrainttemplate/constrainttemplate_controller.go	54.17% <0.00%> (-0.72%)	⬇️
pkg/readiness/list.go	91.17% <0.00%> (+11.76%)	⬆️

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[maxsmythe]

LGTM!