CELIX-25: Added checks to see if a customiser function is NULL. Where needed the default path is used.
CELIX-25: Added checks to see if a customiser function is NULL. Where needed the default path is used.

git-svn-id: b0a1bd8fd09963d3661abf01547333b64b62a32b@1528037 13f79535-47bb-0310-9956-ffa450edef68

apache/incubator-celix,apache/celix,apache/celix,apache/celix,apache/incubator-celix,apache/celix,apache/celix,apache/celix