fix issue 512

[nicktming]

What this PR does:

Which issue(s) this PR fixes:

Fixes #512

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov-commenter]

Codecov Report

Merging #513 (c951a4f) into develop (8e9a974) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #513      +/-   ##
===========================================
- Coverage    54.73%   54.71%   -0.03%     
===========================================
  Files          664      664              
  Lines        77745    77746       +1     
===========================================
- Hits         42557    42537      -20     
- Misses       31556    31573      +17     
- Partials      3632     3636       +4     

Impacted Files	Coverage Δ
pkg/hbone/util.go	82.85% <0.00%> (-11.43%)	⬇️
pkg/istio-agent/xds_proxy_delta.go	45.07% <0.00%> (-6.74%)	⬇️
pilot/pkg/xds/monitoring.go	78.57% <0.00%> (-2.86%)	⬇️
pkg/kube/inject/watcher.go	45.67% <0.00%> (-2.47%)	⬇️
pilot/pkg/xds/adstest.go	66.66% <0.00%> (-1.52%)	⬇️
pkg/istio-agent/xds_proxy.go	60.95% <0.00%> (-1.31%)	⬇️
pilot/pkg/model/jwks_resolver.go	78.29% <0.00%> (-0.78%)	⬇️
security/pkg/nodeagent/cache/secretcache.go	84.94% <0.00%> (-0.77%)	⬇️
...g/serviceregistry/kube/controller/endpointslice.go	73.44% <0.00%> (-0.69%)	⬇️
pilot/pkg/networking/core/v1alpha3/httproute.go	88.12% <0.00%> (-0.53%)	⬇️
... and 6 more

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