fix: refactor eks-managed GetLabelsUpdatePayload

[eytan-avisror]

Signed-off-by: Eytan Avisror [email protected]

fixes #275

[codecov]

Codecov Report

Merging #276 (09ce259) into master (bb272e3) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #276      +/-   ##
==========================================
- Coverage   88.05%   88.05%   -0.01%     
==========================================
  Files          17       17              
  Lines        2319     2318       -1     
==========================================
- Hits         2042     2041       -1     
  Misses        173      173              
  Partials      104      104              

Impacted Files	Coverage Δ
controllers/provisioners/eksmanaged/eksmanaged.go	85.00% <100.00%> (-0.11%)	⬇️

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[eytan-avisror]

27 scenarios (27 passed)
147 steps (147 passed)
26m52.530605422s
testing: warning: no tests to run
PASS
ok  	github.com/keikoproj/instance-manager/test-bdd	1612.963s [no tests to run]