Tests for #1209

- `SoftwareProcessEntityTest#testInstallDirWithVersion`
- `VanillaSoftwareProcessAndChildrenIntegrationTest#testVersion`

Both passing, annoyingly. But on a Linux box I have been using (CentOS 6) I can see the directories `/tmp/brooklyn-andrew/installs/NginxController` and `/tmp/brooklyn-andrew/installs/JavaVM` both obviously lacking version information.