The following test verifies that Savanna can create templates. 

To run the test:
1. Create a flavor for Savanna VMs. (What does "flavor" exactly mean?  I found that it could mean "hardware parameters". Is it? We should add the explanation.)
2. Create a node group template for TaskTracker and DataNode processes.
3. Create a node group template for TaskTracker process.
4. Create a node group template for DataNode process.
5. Create a cluster template using the node group templates.
6. List the group templates for current node.
7. List current cluster templates.
8. Delete the created cluster template.
9. Delete the created node group templates.
10. Delete the created flavor.