Added expose of ownership variables

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Added missing help files.

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Renamed "slave ownership" to "node ownership" according to comments from Daniel Beck.
Resolves https://issues.jenkins-ci.org/browse/JENKINS-18744

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Merge branch 'jenkins_18744_expose_ownership_vars'

Conflicts:
	src/main/resources/com/synopsys/arc/jenkins/plugins/ownership/Messages.properties

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Fixed messages after the merge

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>