CI FIXME: disable cifs test
CI FIXME: disable cifs test

During executing x86/test/fs mount of cifs fs timeouts, making all
subsequent checks fail. Log looks like

> mount -t cifs 10.0.2.10:/Public /mnt/fs_test
WARNING: No signal blocking available
mount: Command returned with code 360: Unknown error code. PLEASE REPORT ISSUE 519!
> ls /mnt/fs_test
> test -t fs_test_read
	test: running embox.test.fs.fs_test_read
	failure at src/tests/fs/fs_test_r.c : 27, in function __test_case_at_line_23
		test_assert(0 <= (fd = open(fs_test_rd_file, O_RDONLY)))
	   case at src/tests/fs/fs_test_r.c : 23
		"Test read operation on fs"

...
		3/3 failures
> test -t fs_test_write
	test: running embox.test.fs.fs_test_write
	failure at src/tests/fs/fs_test_w.c : 24, in function fs_test_write_file
		test_assert(0 <= (fd = open(path, open_flags, FS_TEST_CREAT_MODE)))
	   case at src/tests/fs/fs_test_w.c : 34
		"Test write operation on fs"
...
		1/3 failures

embox/embox,embox/embox,embox/embox,embox/embox,embox/embox,embox/embox