LPS-33129 (6.1.x) Update log4J to version 1.2.17 (from 1.2.16) and change the PatternLayout to EnhancedPatternLayout

Hi Jorge,

In LESA CQU-88, Emma mentioned that I should probably be assigning this pull request to you.  This is a proposed improvement for the Log4j logging for the 6.1.x code branch.

Regards,

Graeme.