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: I3bb21f27182b68246b0485782ddafa64e387d38a
Bug-Url: https://bugzilla.redhat.com/994191
Signed-off-by: Martin Perina <mperina@redhat.com>