Valgrind option added for unittests

[AnttiKauppila]

Added option to select valgrind to be used with unittests

[AnttiKauppila]

Mbed OS needs to be updated first

[AnttiKauppila]

Python 2.7 error is "ERROR: Unknown Error: (128, 'Download failed!\nPlease try again later.')".
I cannot retrigger the build

[AnttiKauppila]

@mark-edgeworth @madchutney Who is in charge of this repo? Mbed OS PR has been merged and this wouold need a test restart + review from stakeholder(s).

[mark-edgeworth]

The mbed build tools team manage this repo. I've triggered a rebuild as requested.

[madchutney]

This doesn't look like it is related to Python 2.7, this test case actually does a lot more than the Python 3 tests. It is probably this way as the extra tests also run against older Mbed versions that do not support Python 3.

I believe the failure is related to a recent problem with a redirect from mbed.org.

[mbed] Adding library "mbed" from "https://mbed.org/users/mbed_official/code/mbed/builds" at rev #3d0ef94e36ec
[mbed] Downloading library build "3d0ef94e36ec" (might take a while)
[mbed] ERROR: Unknown Error: (128, 'Download failed!\nPlease try again later.')

[AnttiKauppila]

What should I do with this now?

[AnttiKauppila]

It might work is mbed.org is replaced by os.mbed.org That is the place where it redirects