Upgrade to Maven Release plugin 2.3

Bug
•[MRELEASE-128] - SCM properties being replaced during release:perform
•[MRELEASE-329] - Parameter descriptions are incomplete
•[MRELEASE-533] - -Darguments ignored with InvokerMavenExecutor
•[MRELEASE-618] - pomFileName and arguments not honoured
•[MRELEASE-623] - unexpected mvn release:prepare behavior for project with <version>2.2-SNAPshot</version>
•[MRELEASE-638] - release:prepare fails w/ java.lang.ClassFormatError: Invalid pc in LineNumberTable in class file org/apache/commons/lang/StringUtils
•[MRELEASE-698] - Inconsistent documentation for 'generate release pom'
•[MRELEASE-727] - release plugin uses wrong checkout directory
•[MRELEASE-740] - release:perform in subdirectories fails if localCheckout=true
•[MRELEASE-745] - Property suppressCommitBeforeBranch also suppresses trunk commit AFTER branching.

Improvement
•[MRELEASE-97] - make release:perform upload progress overwrite the previous xxK/yyK uploaded line
•[MRELEASE-239] - release:perform and release:prepare should accept multi-line goals/preparationGoals configurations
•[MRELEASE-420] - Prepare and Perform should use profile server settings
•[MRELEASE-645] - Allow File/Directory Patterns for the checkModificationExcludes Option
•[MRELEASE-687] - assembly:assembly goal as mentioned in the documentation is deprecated
•[MRELEASE-732] - Use XMLUnit to verify pom.xml in unittests
•[MRELEASE-736] - Add dryRun flag to release:perform

New Feature
•[MRELEASE-723] - DCVS tagging commands should store the tag-name (or hash) in the the //project/scm/tag element.
•[MRELEASE-747] - Support Jazz SCM

Task
•[MRELEASE-731] - Change Maven prerequisite from 2.0.9 to 2.2.1
•[MRELEASE-741] - Migrate JMock to Mockito
•[MRELEASE-744] - Upgrade plexus-utils