engine: Vds initializyng- query improvements

The following patch is doing a following:
1. Remove duplicate query for vds, in order to retrieve it name
2. Replaced query in loop: from getVds() to getVdsDynamic().
   getVdsDynamic() query is faster, and retrirves data only from one single table
3. Fixing error log mesage

Change-Id: Iea601133e62927bc2808feb2f56efd9fb0e675d0
Signed-off-by: Michael Kublin <mkublin@redhat.com>
engine: IrsBroker - code clean up

Code is cleaned. Change is obvious.

Change-Id: I3818a9ec43df939f293630853a99348811aa7127
Signed-off-by: Michael Kublin <mkublin@redhat.com>