Migration guide - EAP7 use different log id

Description of problem:
EAP7 use different log ids. There is a mapping file available here that developers created to help users with the transition long ago:

• jboss-eap-6.4.0-src.zip/log-ids.txt

Customers could download this file in EAP6 sources.

If customers have some automatization for recognizing this log IDs, they should change this automatization.

"log-ids.txt" file contains also some old unused IDs, like IDs for "WildFly Messaging Subsystem".

Related functional jira: JBEAP-150

Example of difference
1. ./standalone.sh

EAP7:
...
10:10:11,061 INFO [org.jboss.as] (MSC service thread 1-7) WFLYSRV0049: JBoss EAP 7.0.0.GA (WildFly Core 2.0.6.Final-redhat-1) starting
...

EAP6:
...
10:08:04,187 INFO [org.jboss.as] (MSC service thread 1-6) JBAS015899: JBoss EAP 6.4.6.GA (AS 7.5.6.Final-redhat-2) starting
...