DJI PSDK leaks memory and resources even when calling de-init

djiuser_KtYl0gScr6EJ

I have a super simple example:

```
DjiUser_SetupEnvironment();

T_DjiUserInfo userInfo{
      "TEST",
      "12345",
      "appId",
      "appId",
      "me@my_email.com",
      "460800"};

DjiUser_FillInUserInfo(&userInfo);
DjiCore_Init(&userInfo);
DjiCore_DeInit();
```

This works, correctly connects to the drone and prints the drone type:

```
[1398845.336][core]-[Info]-[DjiCore_Init:163) Identify AircraftType = Matrice 300 RTK, MountPosition = Payload Port NO3, SdkAdapterType = Skyport V2
Local write: [1398845.336][core]-[Info]-[DjiCore_Init:163) Identify AircraftType = Matrice 300 RTK, MountPosition = Payload Port NO3, SdkAdapterType = Skyport V2
```

However

When we shut down, i have modified the dji application to count the memory allocations and de-allocations as well as thread creation and joining and various other things. It seems that the psdk does not release all of its memory or resources. This is a resource leak a bug. For example, for memory, the psdk misses de-allocating these pointers:

```
=============== Mem Table  ==============
   Pointer |    size  (bytes)
0x561260809460 |    336
0x561260804cd0 |    48
0x5612607ffcc0 |    96
0x561260804c50 |    24
0x561260804bf0 |    24
0x7f75b4000d10 |    384
0x7f75b4000b60 |    384
0x561260804af0 |    24
0x5612607ff7a0 |    48
0x7f75ac001090 |    23
0x7f75ac0010d0 |    92
0x7f75ac0013c0 |    152
0x561260804e30 |    4
0x5612608003f0 |    2048
0x7f75ac001270 |    23
0x5612607ff880 |    48
0x561260804bb0 |    24
0x5612607ff7e0 |    48
0x7f75ac0014a0 |    92
0x7f75ac001530 |    152
TOTAL: 3.97852kb
```

It also misses releasing mutex's, semaphores and threads. This is all just from initialising the core. There may be more when we actually run the application.

I think this must be a bug with the PSDK.