resource: Add a new property "flag" to attributes

resource: Add a new property "flag" to attributes

To distinguish visibility of resource attributes, a new property
is added to each attribute. The visibility of each attribute is
pre-defined. Pass allows or rejects user's request for setting
interested attributes depends on the combination of the
visibility of each resource and the visibility of each attribute.

We used a flag variable for representing the visibility of the
resource attribute. The flag variable can extend to represent
other properties of the resource attribute.

Change-Id: Ie48f00f89ec6095e05e9f8fcf395e1ea0da026bb
Signed-off-by: Sung-hun Kim <sfoon.kim@samsung.com>