Register Capitalized Kind name for PostgresqlList

[mikkeloscar]

Register capitalized version of the postgresqlList Kind.

This is needed because Kubernetes makes assumptions about the capitalization of kind names and when I tried to use a fake informer in a test case I got the following errors:

Failed to watch" err="failed to list *v1.Postgresql: no kind \"PostgresqlList\" is registered for version \"acid.zalan.do/v1\" in scheme \"pkg/runtime/scheme.go:110\"" logger="UnhandledError"

[zalando-robot]

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