packaging: Improve the error message on engine-upgrade when dwh is up (BZ#843495)
packaging: Improve the error message on engine-upgrade when dwh is up (BZ#843495)

https://bugzilla.redhat.com/show_bug.cgi?id=843495

This patch improves the error message when dwhd service is up on engine-upgrade.
The issue is when dwhd service is up, engine update will fail due to open connections to the
DB.

Change-Id: I8ea0d058f8bc9c43ee03be74dcb9d7ed815c0293
Signed-off-by: Kiril Nesenko <c377644256f2520ee68af386b25c50ac247ee8aa@redhat.com>

zerodengxinchao/ovirt-engine,zerodengxinchao/ovirt-engine,eayun/ovirt-engine,eayun/ovirt-engine,zerodengxinchao/ovirt-engine,yingyun001/ovirt-engine,OpenUniversity/ovirt-engine,eayun/ovirt-engine,halober/ovirt-engine,walteryang47/ovirt-engine,walteryang47/ovirt-engine,walteryang47/ovirt-engine,OpenUniversity/ovirt-engine,yapengsong/ovirt-engine,yingyun001/ovirt-engine,yingyun001/ovirt-engine,OpenUniversity/ovirt-engine,walteryang47/ovirt-engine,zerodengxinchao/ovirt-engine,yapengsong/ovirt-engine,walteryang47/ovirt-engine,eayun/ovirt-engine,yingyun001/ovirt-engine,halober/ovirt-engine,OpenUniversity/ovirt-engine,eayun/ovirt-engine,yapengsong/ovirt-engine,yapengsong/ovirt-engine,OpenUniversity/ovirt-engine,halober/ovirt-engine,yingyun001/ovirt-engine,yapengsong/ovirt-engine,halober/ovirt-engine,zerodengxinchao/ovirt-engine