tomcat: Use position independent rules in manifest

Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
tomcat: auto download using make rule

Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
tomcat: add default run configuration

Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>