monitor: Define resource attribute id and data type

monitor: Define resource attribute id and data type

monitor.h header file defines the resource attribute id and data type
of attribute. Resource Manager provides the template and then each resource
is able to make the their own resource driver under src/resource
directory. Also, each resoruce is able to have the multiple attributes
such as min frequency of CPU, max frequency of CPU, available memory of
Memory and so on. Lastly, each attribute must define the their onw data
type like integer, double, string and so on.

Change-Id: I7c869a1db496a78f08f3e735a2319c910af4058c
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>