tools: Fix engine-manage-domains logging config

Fixes engine-manage-domains logging config under JBoss EAP. The problem
started when JBoss EAP reimplemented log4j classes in JBoss Log Manager,
but logging configuration initialization from system property
log4j.configuration has not been included in those reimplemented
classes. This patch initializes log4j configuration for
engine-manage-domains.

Change-Id: I882cc4b6d859a630e3dcf2022f37c41135f25571
Bug-Url: https://bugzilla.redhat.com/994191
Signed-off-by: Martin Perina <mperina@redhat.com>