Parallel deployment

Parallel deployment
- More work separating Context.name & Context.path
- Review use of Context.getName() and Context.getPath() and use the correct one
- Start to add webappVersion property to Context (many components not version aware - e.g. Manager app)
- Set version when deploying apps if version is specified
- Include version in Context.name if version is specified
- New ContextName util class to handle all path/name/version etc translations

In most cases the behaviour is unchanged if the version is not specified. The one exception is JMX ObjectNames that used to contain a key value pair "path=...". Since context path is no longer unique when using versions, this has been changed to "context=..." and the context name used which is unique.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1029527 13f79535-47bb-0310-9956-ffa450edef68