Add portal-service for our utilities
Revert "Removed StringUtil and StringUtil references from PropertiesBundler.java since the portal properties converter no longer resides in liferay-portal; copied StringUtil's replaceLast(String, String, String) method into PropertiesBundler.java"

This reverts commit 8f76161a10cc8caa0c5b48e761eb54feaad8aa7b.
Rebuild properties converter to use portal-service.jar
Merge pull request #473 from jhinkey/LRDOCS-478

LRDOCS-478