webadmin: Rename "kdump detection" to "kdump integration"

Renames term "kdump detection" to "kdump integration" in user visible
parts (UI and logs).

Change-Id: I4bdcf78eb27902951f0298b13bf671bebd828fc6
Bug-Url: https://bugzilla.redhat.com/1079821
Signed-off-by: Martin Perina <mperina@redhat.com>