tools: Replace log4j with JUL as backend for manage-domains

1) Replaces log4j with java.util.logging as logging backend in
   engine-manage-domains.

2) Removes --log4j-config param from engine-manage-domains. It's not
   needed anymore, because custom logging configuration can be
   specified using OVIRT_LOGGING_PROPERTIES environment variable.

Change-Id: I16afc336c26615978392f7d4ff911bf646c42df6
Bug-Url: https://bugzilla.redhat.com/1109871
Signed-off-by: Martin Perina <mperina@redhat.com>