refactor(artifacts): Allow single versioning strategy per ArtifactSup…

…plier (spinnaker#1328)

* refactor(artifacts): Allow single versioning strategy per ArtifactSupplier

* fix(pr): Fix tests

feat(artifacts): Introduce ArtifactSupplier plugin interface (3 of 3) (…

…spinnaker#1321)

* feat(artifacts): Introduce ArtifactPublisher plugin interface (3 of 3)

* chore(pr): Improve logging

* fix(pr): Address review feedback

* chore(pr): More logging

* fix(pr): Ignore statuses for DockerArtifact

* chore(logging): Yet more logging improvements

* refactor(pr): Rename ArtifactPublisher to ArtifactSupplier

* fix(pr): Cleanup left-over file

fix(alb): incorrect field names on ALB upsert task (spinnaker#1318)

fix(veto): Required load balancer veto needs to match account (spinna…

…ker#1179)

Fixes spinnaker#1177

feat(admin): recheck endpoint (spinnaker#1092)

feat(export): export artifacts from clusters (spinnaker#1071)

Vetos for ensuring dependent security groups / load balancers exist (s…

…pinnaker#1040)

* feat(actuation): veto for ensuring dependent security groups exist

See spinnaker#212

* feat(veto): define an interface for cluster dependencies that can also be used by Titus

* chore(veto): move veto optional method no-ops up to interface

* fix(veto): properly await completion of coroutines

* feat(veto): veto to validate load balancers

fix(artifacts): log instead of throw when artifacts have weird status…

…es (spinnaker#1059)

feat(configs): fetch config by app (spinnaker#1050)

fix(ci): fix test that leaks data (spinnaker#1037)