e_comp_object,e_policy_wl: doing focus_stack_lower if ec isn't post_lower set

e_comp_object,e_policy_wl: doing focus_stack_lower if ec isn't post_lower set

There is a focus bug that client appended to focus stack despite it
isn't shown ever.
If client calls evas_object_show & lower, post lower set to client and
doing stack lower.
And Intercept_lower calls focus_stack_lower so that the client appended
to focus stack.
But, the client do not included to focus stack before first shown.
For solve this problem, make post_raise_lower_set little earlier and
didn't call focus_stack_lower if the post_lower set.

Change-Id: I0e9809ca7aa358f88cf5b21bc64dd5f6b29ab996
Signed-off-by: Junseok, Kim <juns.kim@samsung.com>