tools: Fix engine-config logging config

Fixes engine-config 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-config.

Change-Id: I6141d73902d2c5943de3f322996aeedc39e0f151
Bug-Url: https://bugzilla.redhat.com/996962
Signed-off-by: Martin Perina <mperina@redhat.com>