* normalizing version placeholders to use ${groupId}.version as a naming convention e.g.: 'org.springframework.version'
* added properties to parent pom <properties/> section
* spaces -> tabs
* removed empty newlines in poms (favor comments instead of newlines)
* gave all samples nice <name>s
* included ws-inbound-gateway in the samples parent pom <modules> section
* samples now try to run any **/*Tests.java, as per our general conventions
