core: Add VdsKdumpStatus entity

1) Creates vds_kdump_status table
2) Adds stored procedure to access vds_kdump_status table
3) Adds DAO to access the entity

Change-Id: I58696ddefa8602b1daa5f55ab4dc11bdc565e265
Bug-Url: https://bugzilla.redhat.com/1079821
Signed-off-by: Martin Perina <mperina@redhat.com>