enforcer rules examples have misleading <id> tags

The examples below have misleading <id> tags, probably the result of cut and paste errors between examples. There are several instances of these issues, please update to avoid confusion. Thanks!

http://maven.apache.org/enforcer/enforcer-rules/alwaysPass.html
http://maven.apache.org/enforcer/enforcer-rules/requireReleaseDeps.html
http://maven.apache.org/enforcer/enforcer-rules/requireReleaseVersion.html
http://maven.apache.org/enforcer/enforcer-rules/requireMavenVersion.html
http://maven.apache.org/enforcer/enforcer-rules/requireFilesExist.html
http://maven.apache.org/enforcer/enforcer-rules/requireFilesSize.html