Changed licensing rules for Exadata X5-2 with OracleVM

On the Exadata Database Machine, at least 40% of the physical cores must be licensed to run Oracle programs. 
For example, the Exadata Database Machine X5-2 Quarter Rack has four (4) processors with eighteen (18) cores 
each, for a total of seventy-two (72) licensable physical cores. 

At least fourteen (14) Oracle program processor licenses (equivalent to 28 physical cores based on the current
core factor of 0.5) must be licensed. 

Twenty-eight (28) cores allow the customer to run fifty-six (56) virtual CPUs (vCPUs). 
The Exadata Licensing Information guide documents the minimum number of processors that need to be licensed 
for each Exadata configuration. 

The minimum for all other engineered systems is two (2) physical cores. For example, the Exalogic Elastic 
Cloud X3-2 Half Rack has 32 processors with eight cores each, for a total of 256 licensable cores. 

If a customer purchases three (3) processor licenses of WebLogic Suite (equivalent to 6 physical cores based
on the current core factor of 0.50), then the customer is allowed to run 12 vCPUs across all servers 
(6 physical cores = 12 vCPUs), in any desired  combination of virtual machines, e.g., twelve 1-vCPU 
configured VMs or six 2-vCPU configured VMs, etc., as long as the total of number of VMs times the number 
of vCPUs does not exceed the number of physical cores that are licensed.