Remove unneeded unit tests

Remove unneeded unit tests

Now that all unittests are run within a single binary, some tests don't
make sense anymore. Since ewk_init and ewk_set_arguments are called at
the start of the process, utc_blink_ewk_init_func and
utc_blink_ewk_set_arguments_func are useless.

Similarly, utc_blink_ewk_shutdown_func is not needed anymore.

This patch also temporarly disables
utc_blink_ewk_context_local_file_system_all_delete_func and
utc_blink_ewk_context_local_file_system_delete_func. Indeed, they need
--allow-file-access-from-files flag to run, but it's not possible to set
arguments after the initialization. We will enable them again later.

Lastly, it refactors utc_blink_ewk_view_add_func and
utc_blink_ewk_view_add_with_context_fun so that they don't call ewk_init
and ewk_shutdown

Bug: http://107.108.218.239/bugzilla/show_bug.cgi?id=6980
Reviewed by:  SeungSeop Park, Kangil Han

Change-Id: I535b275107680dfe5fd2261c82dfee32a3760b14
Signed-off-by: Arnaud Renevier <a.renevier@samsung.com>