Capture all Cobra results

[Ronoman]

When Cobra is run, it generates an _Autosar_.txt file in the spaceros_ws/src/<pkg>/ directory, for the package its currently testing. In ament_cobra/main.py, we invoke Cobra multiple times. However, each time Cobra is run, it overwrites this _Autosar_.txt file. These commits accomplish a few things:

1. Bump Cobra version to the most recent
2. Resolve the above issue by aggregating Cobra output on each Cobra invocation in ament_cobra/main.py

There are a few things that still need to be included in this PR:

1. Bump Cobra to newer version once a few issues are resolved
2. Update version tag in CMakeLists.txt

However, the present changes are (I hope) the most significant ones, and I think they're ready for review.

@mjeronimo

[Ronoman]

I don't like this, but it's needed in Cobra's current implementation. Cobra dumps a _Autosar_.txt file in spaceros_ws/src/<pkg>/ directory. Is it worth asking Cobra maintainers to update this to optionally take an extra command-line parameter, so this file can instead be put in a better location (say, somewhere in spaceros_ws/build/<pkg>/test_results/)?

[mjeronimo]

Yes, I think that's a good idea. They've been pretty responsive so far. We could also just add the option to Cobra and submit a PR to their repo.

[mjeronimo]

Yes, I think that's a good idea. They've been pretty responsive so far. We could also just add the option to Cobra and submit a PR to their repo.

[ivanperez-keera]

This PR was approved but never merged. I see that there was an intention to change something in Cobra. Did it ever happen? If so, can this be merged or are further changes needed?