add SubnetTier details to DockerContainerImpl.createLocation

comment out (temporarily?) the iptables and portforwarding management inside DockerContainerLocation.obtain
Fix port forwarding management for docker container and host
Use public method in JcloudsUtil to get Docker port mappings
Return container IP address when asked
Add Tomcat shutdown port to list
Use Docker host name as container host name
Just set container IP address and change examples to use JMXMP to work with port forwarding
Merge pull request #13 from cloudsoft/fix-subnet-tier

Add SubnetTier details to DockerContainerImpl.createLocation