fix(controller): fix unhandled panic from malformed rollout

[jessesuen]

Resolves #800

Signed-off-by: Jesse Suen jesse_suen@intuit.com

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this is a chore.
• The title of the PR is (a) conventional, (b) states what changed, and (c) suffixes the related issues number. E.g. "fix(controller): Updates such and such. Fixes #1234".
• I've signed the CLA.
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My builds are green. Try syncing with master if they are not.
• My organization is added to USERS.md.

[codecov-io]

Codecov Report

Merging #801 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #801   +/-   ##
=======================================
  Coverage   82.33%   82.33%           
=======================================
  Files          96       96           
  Lines        8196     8198    +2     
=======================================
+ Hits         6748     6750    +2     
  Misses       1037     1037           
  Partials      411      411           

Impacted Files	Coverage Δ
utils/service/service.go	100.00% <100.00%> (ø)

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[khhirani]

LGTM