Update documentation for initContainers addition in spring-cloud/spring-cloud-deployer#465 [skip ci]

Update paragraph for multiple Init Containers.

Fix mariadb mount to be /var/lib/mysql (spring-cloud#5875)

Fixes spring-cloud#5877

Add spaces after columns for clarity.  This is done during merge

Author: Corneil du Plessis

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

@@ -1123,12 +1123,17 @@ Replace the `statefulSetInitContainerImageName` attribute with the appropriate v
 When you deploy applications, you can set a custom Init Container on a per-application basis.
 Refer to the https://kubernetes.io/docs/concepts/workloads/pods/init-containers/[Init Containers] section of the Kubernetes reference for more information.
 
-The following example shows how you can configure an Init Container for an application:
+The following example shows how you can configure an Init Container or multiple Init Containers for an application:
 
 ====
 [source,options=nowrap]
 ----
 deployer.<application>.kubernetes.initContainer={containerName: 'test', imageName: 'busybox:latest', commands: ['sh', '-c', 'echo hello']}
+# alternative for multiple init containers
+deployer.<application>.kubernetes.initContainers=[{containerName:'test', imageName: 'busybox:latest', commands: ['sh', '-c', 'echo hello']}, {containerName:'test2', imageName:'busybox:latest', commands:['sh', '-c', 'echo world']}]
+# multiple containers can be created inidividually
+deployer.<application>.kubernetes.initContainers[0]={containerName:'test', imageName:'busybox:latest', commands:['sh', '-c', 'echo hello']}
+deployer.<application>.kubernetes.initContainers[1]={containerName:'test2', imageName:'busybox:latest', commands:['sh', '-c', 'echo world']}
 ----
 ====