Fix format string and variable name

Fix format string and variable name

By changing data type of uid, many mismatchess between data of format string and variable are
generated. And also, the name 'uid' is used too generally. I may cause misunderstand about
the purpose of the variable.

To solve this problem, this patch changes the format string to match the variables. And also,
this patch changes the name of variable to make name more clear.

Change-Id: Id86e57b5ce39589c7c65eeb9106abf8040f6aed6
Signed-off-by: Suyeon Hwang <stom.hwang@samsung.com>