mbed test with dual core targets

For Dual Core targets, there are in fact 2 sub-targets, CM4 and CM7 targets.
This allows to execute tests with boards detected by mbedls.

Author: jeromecoutant

tools/test_api.py

@@ -2276,6 +2276,9 @@ def test_spec_from_test_builds(test_builds):
 
             if test_builds[build]['platform'].endswith('_NPSA'):
                 test_builds[build]['platform'] = test_builds[build]['platform'][:-5]
+        # Convert Dual Core target name to test spec platform name
+        if test_builds[build]['platform'].endswith('_CM4') or test_builds[build]['platform'].endswith('_CM7'):
+            test_builds[build]['platform'] = test_builds[build]['platform'][:-4]
     return {
         "builds": test_builds
     }