kdump: Fix kexec-tools detection in node

Use ovirt-node-plugin-vdsm version to detect support of fence_kdump
options in kexec-tools package. Plugin version 0.2.0 depends on
ovirt-host-deploy-offline >= 1.3.0 which depends on correct kexec-tools
version.

Change-Id: I136469c35e7fc11d3eb89ab5b4fc71395010f42b
Bug-Url: https://bugzilla.redhat.com/1079821
Signed-off-by: Martin Perina <mperina@redhat.com>