Fix password property in example.
Fix password property in example.

* Update spring-cloud-vault.adoc

Updated password property in example to match the spring datasource password

* Fixing the rest of the property examples

Updating all property examples so the password property is mapped to a datasource password property


Original pull request: gh-324.
spring-cloud-incubator/spring-cloud-vault-config,spring-cloud-incubator/spring-cloud-vault-config,spencergibb/spring-cloud-vault-config,spencergibb/spring-cloud-vault-config