Support CPU quota and period setting

Change-Id: Ied31f1a5ac90b6d60972c98df824c1ede336470f
Support vcpu pin operations

The vcpu pin info will in body with key "vcpu_pin".
value accpect is a list whose item is a boolean array.
eg. [[true, true],[true,false]]
Each outer list item stands for each vcpu
Each inner list item stands for whether pin the vcpu to the id of host cpu.

Change-Id: I2980de09d33e0c3458ea392c033718065cc4167f