Combine consecutive, mutually-exclusive status checks

[thnkslprpt]

Checklist

• [x] I reviewed the Contributing Guide.
• [x] I performed a cursory search to see if the bug report is relevant, not redundant, nor in conflict with other tickets.

Describe the bug md_app.c contains a couple of consecutive, mutually exclusive status checks.

Code snips https://github.com/nasa/MD/blob/116d2986500101551beb32bcd3fa30de4cfd39b9/fsw/src/md_app.c#L188-L197 https://github.com/nasa/MD/blob/116d2986500101551beb32bcd3fa30de4cfd39b9/fsw/src/md_app.c#L274-L283

Expected behavior Combine into an if/else - no need to do 2 evaluations.

Reporter Info Avi Weiss @thnkslprpt