Remove use of PROTECTED, PRIVATE

[m-aleem]

In support of #3446, remove use of PROTECTED and PRIVATE (STATIC already unsused)

[bocchino]

@m-aleem Is the next step here to create an alpha release of FPP, integrate it with F Prime, and remove PRIVATE and PROTECTED completely from F Prime? If so, I will go ahead and create the alpha release.

[m-aleem]

@bocchino Yes, we need an FPP alpha release + we also need to merge nasa/fprime#3810

Here is my recommended series of steps at this point:

1. Review + Merge Pull Request Updates for FPPTest corresponding to UT cmake update for protected/private fprime#3810: Updates in FppTest, doesn’t need FPP alpha release
2. FPP alpha release + integrate it with F Prime that includes Add state machine Tester friend #753
3. Review + Merge Pull Request Reset PROTECTED/PRIVATE/STATIC override flags fprime#3815: Update -D macro flags to private/protected/static, checks from this ensure we’re actually ok without the override flags being removed
4. Review + Merge Pull Request Remove use of PROTECTED, PRIVATE #754: Remove PROTECTED and PRIVATE from FPP
5. FPP alpha release + integrate it with F Prime that includes Remove use of PROTECTED, PRIVATE #754
6. Review + Merge Pull Request Remove PRIVATE PROTECTED and STATIC access overrides fprime#3821: Actually remove -D<PRIVATE/PROTECTED/STATIC> macros & documentation, relies on FPP alpha release from previous step
7. Review + Merge Pull Request Removal of PRIVATE/PROTECTED/STATIC pre/post-process fprime-tools#267: Remove PRIVATE/PROTECTED/STATIC from fprime-tools

[bocchino]

Sounds good, thanks! I would like to go over nasa/fprime#3810 at our next regular meeting. It looks good to me so far, but I want to make sure I understand the patterns used to make the changes.