refactor pilot-config-monitor

[knightXun]

refactor config compare function

[ymesika]

/ok-to-test

[costinm]

/lgtm

[codecov]

Codecov Report

Merging #8371 into master will increase coverage by 1%.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master   #8371    +/-   ##
=======================================
+ Coverage      72%     72%    +1%     
=======================================
  Files         377     377            
  Lines       33077   32906   -171     
=======================================
- Hits        23633   23530   -103     
+ Misses       8433    8352    -81     
- Partials     1011    1024    +13

Impacted Files	Coverage Δ
pilot/pkg/config/monitor/monitor.go	78% <100%> (ø)	⬇️
...olarwinds/internal/papertrail/papertrail_logger.go	62% <0%> (-18%)	⬇️
mixer/adapter/stackdriver/stackdriver.go	50% <0%> (-4%)	⬇️
pilot/pkg/serviceregistry/kube/queue.go	84% <0%> (-4%)	⬇️
pilot/pkg/serviceregistry/consul/monitor.go	81% <0%> (-4%)	⬇️
mixer/adapter/rbac/rbacStore.go	77% <0%> (-3%)	⬇️
mixer/adapter/opa/opa.go	79% <0%> (-1%)	⬇️
pilot/pkg/serviceregistry/kube/controller.go	66% <0%> (ø)	⬇️
mixer/pkg/protobuf/yaml/dynamic/primitive.go	98% <0%> (ø)	⬇️
mixer/adapter/dogstatsd/dogstatsd.go	100% <0%> (ø)	⬆️
... and 21 more

---

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[knightXun]

/test e2e-mixer-no_auth

[rshriram]

/lgtm

[istio-testing]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: costinm, rshriram

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Needs approval from an approver in each of these files:

• pilot/OWNERS [costinm,rshriram]

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[knightXun]

/test istio-unit-tests