【内核子系统集成测试】修改不稳定的用例：time_posix 模块AlarmTest.cpp用例AlarmTest.testTimerCreateFork 定时器资源耗尽修改。

Change-Id: I28596fee91e500a25307d608f238871ccf938459
Signed-off-by: Ngao_harmony <gaofeng44@huawei.com>

kernel_lite/time_posix/src/AlarmTest.cpp

@@ -360,6 +360,7 @@ HWTEST_F(AlarmTest, testTimerCreateFork, Function | MediumTest | Level2)
         Msleep(setMillisec + ACCURACY_ERROR);
         EXPECT_EQ(mReceivedSignal, SIGALRM);
         WaitProcExitedOK(pid);
+	EXPECT_EQ(timer_delete(tid), 0) << "ERROR: timer_delete() != 0";
     }
 }