…r references from `etcd`.

This commit refactors the `configmap` component to use the default labels and owner references provided by etcd. Specifically, we removed the functions `getOwnerReferences` and `getObjectMeta`, and instead used the `GetEtcdAsOwnerReference` and `GetDefaultLabels` functions.

In addition, we improved the formulation of the configmap by adding a new function called `getEtcdConfigYaml`.

…ferences from `etcd`.

This commit refactors the `lease` component to use the default labels and owner references provided by etcd. Specifically, we removed the functions `getOwnerReferences`, and instead used the `GetEtcdAsOwnerReference` and `GetDefaultLabels` functions.

…s and owner references from `etcd`.

This commit refactors the `poddisruptionbudget` component to use the default labels and owner references provided by etcd. Specifically, we removed the functions `getOwnerReferences`, and instead used the `GetEtcdAsOwnerReference` and `GetDefaultLabels` functions.

…references from `etcd`.

This commit refactors the `service` component to use the default labels and owner references provided by etcd. Specifically, removed the functions `getOwnerReferences`, `getSelectors`, `getLabels` and instead used the `GetEtcdAsOwnerReference` and `GetDefaultLabels` functions.

…ner references from `etcd`.

This commit refactors the `statefulset` component to use the default labels and owner references provided by etcd. Specifically, removed the functions `getCommonLabels` and instead used the `GetAsOwnerReference` and `GetDefaultLabels` functions.

Fix intergration test

rebase with master

This commit addresses the review comment gardener#539 (comment)

… the service account test in response to gardener#538 (review)

…tead of the static string 'druid.gardener.cloud/v1alpha1

- Updated function `GetAsOwnerReference to return metav1.OwnerReference instead of *metav1.OwnerReference

…ace from component's value

…oncatenation

Co-authored-by: Aaron Francis Fernandes <79958509+aaronfern@users.noreply.github.com>

Co-authored-by: Shreyas Rao <42259948+shreyas-s-rao@users.noreply.github.com>

- Renamed field `PodAdditionalLabels` to `AdditionalPodLabels`.

Co-authored-by: Shreyas Rao <42259948+shreyas-s-rao@users.noreply.github.com>