update startup_lite/syspara_posix/src/ParameterTest.cpp.

L1 linux xts 测试用例 `//test/xts/acts/startup_lite/syspara_posix:ActsParameterTest` 中参数的存储路径是`/data/system/param/`， 但是 `//base/startup/syspara_lite/frameworks/parameter/src/param_impl_posix/param_impl_posix.c` 中定义的参数存储路径为`/storage/data/system/param/`，两者不一致，导致测试测试用例失败。

现将测试用例中的参数存储路径改为 param 组件中定义的路径，两者保持一致。
Signed-off-by: Luo Xiaogang <lxgrxd@163.com>

startup_lite/syspara_posix/src/ParameterTest.cpp

@@ -28,9 +28,10 @@ class ParameterTest : public testing::Test {
 protected:
     static void SetUpTestCase(void) 
     {
-        mkdir("/data", S_IRUSR | S_IWUSR);
-        mkdir("/data/system", S_IRUSR | S_IWUSR);
-        mkdir("/data/system/param", S_IRUSR | S_IWUSR);
+        mkdir("/storage", S_IRUSR | S_IWUSR);
+        mkdir("/storage/data", S_IRUSR | S_IWUSR);
+        mkdir("/storage/data/system", S_IRUSR | S_IWUSR);
+        mkdir("/storage/data/system/param", S_IRUSR | S_IWUSR);
     }
     static void TearDownTestCase(void) {}
     virtual void SetUp() {}