Restructured OwnershipDescription, no "optional" block for slaves

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Added stubs for "Manage ownership" permissions

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

Conflicts:
	src/main/java/com/synopsys/arc/jenkins/plugins/ownership/OwnershipPlugin.java

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Replaced e-mail suffix by MailAddressResolver + refactoring of the appearance.
Resolves https://issues.jenkins-ci.org/browse/JENKINS-18745.

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Merge branch 'master' of https://github.com/synopsys-arc-oss/ownership-plugin
Merge branch 'master' of https://github.com/jenkinsci/ownership-plugin