Disable unit tests

Disable unit tests

Currently, aul-unit-tests make build error issues.
While calling aul_launch_fini(), the AUL worker thread will not be
terminated. Because, the glib codes are not working fine.
The process of aul-unit-tests always waits g_thread_join().

+---------------------------------------------------------------------+
|#0  0xb77a6a49 in __kernel_vsyscall ()                               |
|#1  0xb77536e7 in __GI___pthread_timedjoin_ex (                      |
|               threadid=<optimized out>, threadid@entry=3061508928,  |
|               thread_return=thread_return@entry=0x0,                |
|               abstime=abstime@entry=0x0, block=block@entry=true)    |
|               at pthread_join_common.c:142                          |
|#2  0xb7753466 in __pthread_join (threadid=3061508928,               |
|               thread_return=thread_return@entry=0x0)                |
|               at pthread_join.c:24                                  |
|#3  0xb764161a in g_system_thread_wait (                             |
|               thread=thread@entry=0x802ada00)                       |
|               at ../glib/gthread-posix.c:1235                       |
|#4  0xb76191c9 in g_thread_join (                                    |
|               thread=0x802ada00) at ../glib/gthread.c:959           |
|#5  0xb7558fbb in aul_worker_destroy (handle=handle@entry=0x802aa380)|
+---------------------------------------------------------------------+

Change-Id: I696e42375f36170535b5aead29432ff94afc7b7c
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>