core: Fix Coverity Scan on getVdsStaticDao method

Coverity Scan marked getVdsStaticDao method name as confusing. This patch
pulls up this method to AuditLogableBase

Change-Id: I69ea5f345e6758939a01997e161cd064a4c1d7f4
Signed-off-by: lzelkha@redhat.com <lzelkha@redhat.com>