Refactor to enabling reloading rather than redploying of a context when a WAR file changes and there is an XML file present in the Host's configBase. In this scenario, the context object doesn't need to be re-created because it's config won't change - it is defined by the unchanged XML file in the HOst's configBase.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1483552 13f79535-47bb-0310-9956-ffa450edef68
Remaining tests for modification

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1483554 13f79535-47bb-0310-9956-ffa450edef68