[JENKINS-17667] Reverting commit e3952f41c5649c326ace3cc263420a8c287e1e7c.
[maven-release-plugin] prepare release jenkins-1.573
[maven-release-plugin] prepare for next development iteration
updated changelog for release
updated changelog as a part of the release
merged back the RC branch

Conflicts:
	core/src/main/java/hudson/tools/InstallerTranslator.java
creating an RC branch
the trunk is toward 1.575-SNAPSHOT
<l:icon> layout tag