BUG-672 Make Xml directory adapter skip initial config files with invalid xml.

Issue a warning and continue to next file.

Change-Id: I1950eddc80b958f5887458ebeaa53b590506c31c
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
Merge "BUG-672 Make Xml directory adapter skip initial config files with invalid xml."