Fix #289, Add RTEMS build and test workflows

[nmullane]

Add two workflows for building and testing cFS in both RTEMS 4.11 and 5
Add scripts folder into .github for running all unit tests inside QEMU
Use dockerhub to store docker image containing all QEMU and RTEMS
toolchain and dependencies

Checklist (Please check before submitting)

• I reviewed the Contributing Guide.
• I signed and emailed the appropriate Contributor License agreement to GSFC-SoftwareRelease@mail.nasa.gov and copied cfs-program@lists.nasa.gov.

Describe the contribution

• Added two GitHub Actions workflows to build and test cFS in RTEMS 4.11 and RTEMS 5.
• Added two bash scripts which are used in the new workflows to run every unit test in QEMU and to generate the logs for the unit tests.
• Created two docker images which are used in GitHub Actions to run the tests without having to install and configure QEMU and RTEMS.
  • The source Dockerfiles are located here and the images can be found here.

• Fixes Add RTEMS build and test to CI #289
• Also fixes the related issue Add pc-linux toolchain "cross-compile" to CI #69

Testing performed
Steps taken to test the contribution:

1. Tested the behavior of the added workflows in GitHub Actions.
2. The latest runs show that not all unit tests are capable of passing in the RTEMS configuration.
   1. RTEMS 4.11 workflow run
   2. RTEMS 5 workflow run

Expected behavior changes
There is no expected behavior change. Additions were only made in the .github folder

System(s) tested on

• GitHub Actions ubuntu 18.04 runner

Additional context

Code contributions
The only code contributions are in the .github folder.

Contributor Info - All information REQUIRED for consideration of pull request
Niall Mullane - GSFC 582 Intern

[jphickey]

I have a few suggestions of things that can simplify. I also have some command templates/makefiles to generate the "cow" images that are used to provide a filesystem, which I can provide as needed.

[astrogeco]

@nmullane is this ready for CCB review?

[nmullane]

@astrogeco This should be ready for CCB review once I clean up the git commit history.

[astrogeco]

Hey Niall, can you amend or fixup your commits to match the Fix #XYZ, DESCRIPTION format? you're 95% there with your current ones. Just missing a comma.

[astrogeco]

CCB:2021-07-14 APPROVED with CHANGES

• need to move some files into the container to make the modules test pass
• Where do we want to keep the scripts?
• Do we want to set up a docker registry?
• All unit tests respond with a "BUG Summary" message which is intended behavior because the tests invoke error messages

[astrogeco]

CCB:2021-07-21

• Figure out how to pull test list from cmake and ctest instead of hardcoding it
• Add jphickey as a coauthor in git commit where appropriate
• Add '-k' option to make so it doesn't "stop" on failure and runs all tests
• Wildcard approach might work
  • How to exclude network ones? It might work when they return "not implemented"
  • The osal network functions are implemented but depend on the psp, it will work if booted with cFE but not if booted straight into osal
  • Need a mechanism to run tests with more appropriate psp environment @jphickey to link error

[astrogeco]

@nmullane can you squash the last three commits and add the "Fix #" prefix?

[astrogeco]

@jphickey is this good to go?

[astrogeco]

CCB:2021-07-28 APPROVED with minor change

• Update workflows readme
• Open issue to add a big-endian CPU qemu using the makefile