DB: Fix Network QoS DAO

With the introduction of the new dao framework,
some methods should comply to the expected naming conventions.
This patch fixes the GetAllFrom which had a different name.

Change-Id: I7f9480614a0b9a9705c57f82e927e7bfb1ebec2b
Signed-off-by: Doron Fediuck <dfediuck@redhat.com>