Deprecate componentParameterOverrides in favor of source specific config

[jessesuen]

1. begins the deprecation process of componentParameterOverrides. Application reconciliation will invoke migration logic to move componentParameterOverrides to their new locations in ksonnet.parameters, helm.parameters, and kustomize.imageTags. componentParameterOverrides will be removed in a future release (likely the next release).

Resolves #1141

2. With the deprecation of componentParameterOverrides, we now store the entire appSource as part of sync history. This allows us to rollback even when user changes things like the repo, path, kustomize namePrefix, etc...

Resolves #1196

3. Removes the legacy spec.source.environment and spec.source.valuesFiles which were deprecated in v0.11

4. Fixes small issue where argocd app create APPNAME --file didn't fail when there were name conflicts

Resolves: #1201

6. Fixes issue where auto-sync and app deletion would fight each other

Resolves: #1208

[codecov-io]

Codecov Report

Merging #1207 into master will increase coverage by 0.18%.
The diff coverage is 68.65%.

@@            Coverage Diff             @@
##           master    #1207      +/-   ##
==========================================
+ Coverage   36.27%   36.45%   +0.18%     
==========================================
  Files          59       59              
  Lines        8749     8777      +28     
==========================================
+ Hits         3174     3200      +26     
- Misses       5114     5117       +3     
+ Partials      461      460       -1

Impacted Files	Coverage Δ
util/cache/cache.go	0% <0%> (ø)	⬆️
controller/state.go	74.73% <100%> (-0.27%)	⬇️
util/argo/diff_normalizer.go	77.19% <100%> (ø)	⬆️
reposerver/repository/repository.go	34.15% <19.04%> (-1.76%)	⬇️
server/application/application.go	27.61% <66.66%> (-0.13%)	⬇️
util/kustomize/kustomize.go	77.66% <69.23%> (+0.21%)	⬆️
controller/sync.go	70.79% <70.58%> (+0.26%)	⬆️
util/argo/argo.go	29.56% <73.13%> (+7.49%)	⬆️
util/helm/helm.go	62.39% <75%> (+0.32%)	⬆️
controller/appcontroller.go	30.43% <93.75%> (+1.18%)	⬆️
... and 1 more

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[jessesuen]

Example of the new history. Notice it is able to switch between repo paths and app source types.

  - deployedAt: "2019-03-01T07:28:32Z"
    id: 12
    revision: a95c7943effa602740aa54fe4755ad3f4870bee3
    source:
      ksonnet:
        environment: default
      path: ksonnet-guestbook
      repoURL: https://github.com/argoproj/argocd-example-apps
      targetRevision: HEAD
  - deployedAt: "2019-03-01T07:28:44Z"
    id: 13
    revision: a95c7943effa602740aa54fe4755ad3f4870bee3
    source:
      ksonnet:
        environment: default
      path: ksonnet-guestbook
      repoURL: https://github.com/argoproj/argocd-example-apps
      targetRevision: HEAD
  - deployedAt: "2019-03-01T07:29:06Z"
    id: 14
    revision: a95c7943effa602740aa54fe4755ad3f4870bee3
    source:
      path: guestbook
      repoURL: https://github.com/argoproj/argocd-example-apps
      targetRevision: HEAD

[alexmt]

LGTM