Prevent possible WAR file locking when reading context.xml from WAR

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1482310 13f79535-47bb-0310-9956-ffa450edef68
Ensure HostConfig has the latest settings of copyXML, deployXML and unpackWARs before performing automatic deployment.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1482312 13f79535-47bb-0310-9956-ffa450edef68