Server: improved error logging

git-svn-id: https://svn.apache.org/repos/asf/chemistry/opencmis/trunk@1625482 13f79535-47bb-0310-9956-ffa450edef68
CMIS-841: Web Services client: fixed Java 8 issue

git-svn-id: https://svn.apache.org/repos/asf/chemistry/opencmis/trunk@1625486 13f79535-47bb-0310-9956-ffa450edef68