add deprecation comments
[FIXED JENKINS-21712] The merge lost the switch to <c:select/>

- Refactored the UI to a more modern jelly structure as this made the form validation and updating easier
fix tags parameter for authentication
integrate tag action with credentials
[maven-release-plugin] prepare release subversion-2.1
[maven-release-plugin] prepare for next development iteration
Merge branch 'master' into ListSubversionTagsParameterDefinition-performance

Conflicts:
	src/main/java/hudson/scm/listtagsparameter/ListSubversionTagsParameterDefinition.java
	src/test/java/hudson/scm/listtagsparameter/ListSubversionTagsParameterDefinitionTest.java