aaa: Moved DomainsPasswordMap to utils

Not only dal uses this , but also vdsbroker and bll.
It has no db specific code, but rather depeneds on encrypt utils
which is part of utils.

Topic: AAA
Change-Id: Iaa7b65e62f9dd6a1bf3557631558715e5ca18d46
Signed-off-by: Yair Zaslavsky <yzaslavs@redhat.com>