Improve support for Parallel deployment.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1445062 13f79535-47bb-0310-9956-ffa450edef68
Improve support for metadata-complete.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1445072 13f79535-47bb-0310-9956-ffa450edef68