Add basic VM Cluster application

This patch adds new Murano application which demonstrates an ability to create a cluster of VMs behind Neutron Load Balancer.
Add abstract Tomcat Servlet Container application

This patch adds new abstract Tomcat Servlet Container application to provide an abstract interface for different Tomcat deployments.
Add abstract Tomcat single instance application

This patch adds new  Tomcat single instance application to implement Tomcat Servlet Container interface. This application creates a single VM and installs a tomcat service on it.
Add abstract Tomcat cluster  application

This patch adds new  Tomcat cluster  application to implement Tomcat Servlet Container interface. This application creates a cluster of VM and installs a tomcat service on them. This app creates a Load balancer pool and puts created instances to this LB pool as pool members. The app returns LB floating IP as a public IP.
Add  clustered HelloWorld application

This patch adds new  HelloWorld java application which can be installed onto Tomcat single or Tomcat Cluster.
Fix Murano installation process