Script for UNIX conversion doesn't reflect JBOSS_HOME property, possibility to convert all files in system

Change 'EAP_ROOT=../..' to resolve correctly path with EAP installation like in run.sh.

With current implementation of convert-dos2unix.sh there is quite issue with relative path. When you execute it from your home directory you would change all files in system because you call ../..

Use DIRNAME=`dirname $0` to identify path to jboss-eap-5.1/jboss-as/bin directory.

JBOSS_HOME property must be evaluated too to be compatible with other .sh scripts.