NOT_SUPPORTED error was not supported any more in test_api.py script

[jeromecoutant]

Description

If OS2 test contains the NOT_SUPPORTED error directive, script was crashing:

[Error] : #35: #error directive: [NOT_SUPPORTED]
Traceback (most recent call last):
File "tools/singletest.py", line 262, in
if (singletest_in_cli_mode(single_test)):
File "C:\github\mbed\tools\test_api.py", line 1545, in singletest_in_cli_mode
test_summary, shuffle_seed, test_summary_ext, test_suite_properties_ext, build_report, build_properties = single_test.execute()
File "C:\github\mbed\tools\test_api.py", line 649, in execute
self.execute_thread_slice(q, target, toolchains, clean, test_ids, self.build_report, self.build_properties)
File "C:\github\mbed\tools\test_api.py", line 529, in execute_thread_slice
print(elf.logger.log_line(
NameError: global name 'elf' is not defined

@theotherjimmy

Pull request type

[X] Fix
[ ] Refactor
[ ] New target
[ ] Feature
[ ] Breaking change

[0xc0170]

/morph build

[mbed-ci]

Build : FAILURE

Build number : 2045
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/6939/

[0xc0170]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 2074
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/6939/

Triggering tests

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

[mbed-ci]

Test : SUCCESS

Build number : 1885
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/6939/1885

[mbed-ci]

Exporter Build : SUCCESS

Build number : 1720
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/6939/

[jeromecoutant]

Hi
Please add this patch in the next os2 release version.