[CI] Remove MariaDB specific init-container. (spring-cloud#5635)

Author: Corneil du Plessis

spring-cloud-dataflow-docs/src/main/asciidoc/configuration-kubernetes-app-properties.adoc

@@ -1158,6 +1158,6 @@ The following example shows how you can configure additional containers for an a
 ====
 [source,options=nowrap]
 ----
-deployer.<application>.kubernetes.additionalContainers=[{name: 'c1', image: 'busybox:latest', command: ['sh', '-c', 'echo hello1'], volumeMounts: [{name: 'test-volume', mountPath: '/tmp', readOnly: true}]},{name: 'c2', image: 'busybox:1.26.1', command: ['sh', '-c', 'echo hello2']}]
+deployer.<application>.kubernetes.additionalContainers=[{name: 'c1', image: 'busybox:1', command: ['sh', '-c', 'echo hello1'], volumeMounts: [{name: 'test-volume', mountPath: '/tmp', readOnly: true}]},{name: 'c2', image: 'busybox:1.26.1', command: ['sh', '-c', 'echo hello2']}]
 ----
 ====

spring-cloud-dataflow-docs/src/main/asciidoc/configuration-kubernetes.adoc

@@ -399,11 +399,11 @@ These properties are also used when configuring the <<configuration-kubernetes-t
 |<none>
 
 |initContainer
-|An Init Container expressed in YAML format to be applied to a pod. e.g. ```{containerName: 'test', imageName: 'busybox:latest', commands: ['sh', '-c', 'echo hello']}```
+|An Init Container expressed in YAML format to be applied to a pod. e.g. ```{containerName: 'test', imageName: 'busybox:1', commands: ['sh', '-c', 'echo hello']}```
 |<none>
 
 |additionalContainers
-|Additional containers expressed in YAML format to be applied to a pod. e.g. ```[{name: 'c1', image: 'busybox:latest', command: ['sh', '-c', 'echo hello1'], volumeMounts: [{name: 'test-volume', mountPath: '/tmp', readOnly: true}]}, {name: 'c2', image: 'busybox:1.26.1', command: ['sh', '-c', 'echo hello2']}]```
+|Additional containers expressed in YAML format to be applied to a pod. e.g. ```[{name: 'c1', image: 'busybox:1', command: ['sh', '-c', 'echo hello1'], volumeMounts: [{name: 'test-volume', mountPath: '/tmp', readOnly: true}]}, {name: 'c2', image: 'busybox:1.26.1', command: ['sh', '-c', 'echo hello2']}]```
 |<none>
 |===
 

src/kubernetes/server/server-deployment.yaml

@@ -80,11 +80,6 @@ spec:
           # Provide the Skipper service location
         - name: SPRING_CLOUD_SKIPPER_CLIENT_SERVER_URI
           value: 'http://${SKIPPER_SERVICE_HOST}:${SKIPPER_SERVICE_PORT}/api'
-      initContainers:
-      - name: init-mariadb-wait
-        image: busybox:1
-        imagePullPolicy: IfNotPresent
-        command: ['sh', '-c', 'until nc -w3 -z mariadb 3306; do echo waiting for mariadb; sleep 3; done;']
       serviceAccountName: scdf-sa
       volumes:
         - name: config

src/kubernetes/skipper/skipper-deployment.yaml

@@ -69,20 +69,6 @@ spec:
           value: 'false'
         - name: SPRING_CLOUD_KUBERNETES_SECRETS_PATHS
           value: /etc/secrets
-      initContainers:
-      - name: init-mariadb-wait
-        image: busybox:1
-        imagePullPolicy: IfNotPresent
-        command: ['sh', '-c', 'until nc -w3 -z mariadb 3306; do echo waiting for mariadb; sleep 3; done;']
-      - name: init-mariadb-database
-        image: mariadb:10.4
-        env:
-        - name: MARIADB_PWD
-          valueFrom:
-            secretKeyRef:
-              name: mariadb
-              key: database-password
-        command: ['sh', '-c', 'mariadb -h mariadb -u root --password=$MARIADB_PWD -e "CREATE DATABASE IF NOT EXISTS skipper;"']
       serviceAccountName: scdf-sa
       volumes:
         - name: config

src/templates/kubernetes/server/server-deployment.yaml

@@ -76,11 +76,6 @@ spec:
             # Provide the Skipper service location
           - name: SPRING_CLOUD_SKIPPER_CLIENT_SERVER_URI
             value: 'http://${SKIPPER_SERVICE_HOST}:${SKIPPER_SERVICE_PORT}/api'
-      initContainers:
-      - name: init-mariadb-wait
-        image: busybox:1
-        imagePullPolicy: IfNotPresent
-        command: ['sh', '-c', 'until nc -w3 -z mariadb 3306; do echo waiting for mariadb; sleep 3; done;']
       serviceAccountName: scdf-sa
       volumes:
         - name: config

src/templates/kubernetes/skipper/skipper-deployment.yaml

@@ -70,20 +70,6 @@ spec:
             value: 'false'
           - name: SPRING_CLOUD_KUBERNETES_SECRETS_PATHS
             value: /etc/secrets
-      initContainers:
-      - name: init-mariadb-wait
-        image: busybox:1
-        imagePullPolicy: IfNotPresent
-        command: ['sh', '-c', 'until nc -w3 -z mariadb 3306; do echo waiting for mariadb; sleep 3; done;']
-      - name: init-mariadb-database
-        image: mariadb:10.4
-        env:
-        - name: MARIADB_PWD
-          valueFrom:
-            secretKeyRef:
-              name: mariadb
-              key: database-password
-        command: ['sh', '-c', 'mariadb -h mariadb -u root --password=$MARIADB_PWD -e "CREATE DATABASE IF NOT EXISTS skipper;"']
       serviceAccountName: scdf-sa
       volumes:
         - name: config