Move unittest paths to hyphens

[bridadan]

Description

This PR is part of the 5.10 OOB process.

This PR proposes to move the naming convention for unittests to be consistent with the naming convention for greentea and icetea tests. Currently, unittests name test suites by separating directory names by underscores. So for example, a test contained in features/netsocket/NetworkInterface would be named features_netsocket_NetworkInterface. However, the existing test frameworks for greentea and icetea uses hyphens, so it would be named features-netsocket-NetworkInterface. This PR moves the naming to use hyphens to be inline with the current frameworks.

Pull request type

[ ] Fix
[x] Refactor
[ ] Target update
[ ] Functionality change
[ ] Breaking change

[SeppoTakalo]

CC: @lorjala

[lorjala]

Looks good.

[bridadan]

Thanks for the review @SeppoTakalo and @lorjala. I did a best-effort search-and-replace for anything that was _ separated and moved them to - separated, hope I didn't miss anything 😄

[cmonr]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 3059
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/8066/

Triggering tests

/morph test
/morph export-build
/morph mbed2-build

[mbed-ci]

Exporter Build : SUCCESS

Build number : 2673
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/8066/

[mbed-ci]

Test : SUCCESS

Build number : 2841
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/8066/2841