[MPLUGIN-262] generated HelpMojo doesn't display default values and user properties.
Submitted by: Slawomir Jaranowski
applied with format fixes and check of expected output

git-svn-id: https://svn.apache.org/repos/asf/maven/plugin-tools/trunk@1590390 13f79535-47bb-0310-9956-ffa450edef68
added contributor

git-svn-id: https://svn.apache.org/repos/asf/maven/plugin-tools/trunk@1590391 13f79535-47bb-0310-9956-ffa450edef68