TackleTest is failing during augmentation when the ctd-generated test suite is of size zero

Describe the bug

Run TackleTest unit on the following app: https://github.com/shashirajraja/onlinebookstore/

With Java 8

Toml file:

[tkltest|13:43:46.831] Coverage information for CTD-guided tests: instruction=0/0(0.0%), branch=0/0(0.0%), line=0/0(0.0%), method=0/0(0.0%)
                                                 coverage_efficiency=0 (0 test methods)
Traceback (most recent call last):
  File "C:\MyStuff\MyStuffWork\ConTest\Modernization\Workspace\tackle-test-generator-cli\venv\Scripts\tkltest-unit-script.py", line 33, in <module>
    sys.exit(load_entry_point('tkltest', 'console_scripts', 'tkltest-unit')())
  File "c:\mystuff\mystuffwork\contest\modernization\workspace\tackle-test-generator-cli\tkltest\tkltest_unit.py", line 76, in main
    __process_command(args, config)
  File "c:\mystuff\mystuffwork\contest\modernization\workspace\tackle-test-generator-cli\tkltest\tkltest_unit.py", line 108, in __process_command
    generate.process_generate_command(args, config)
  File "c:\mystuff\mystuffwork\contest\modernization\workspace\tackle-test-generator-cli\tkltest\generate\unit\generate.py", line 55, in process_generate_command
    generate_ctd_amplified_tests(config, output_dir)
  File "c:\mystuff\mystuffwork\contest\modernization\workspace\tackle-test-generator-cli\tkltest\generate\unit\generate.py", line 246, in generate_ctd_amplified_tests
    has_coverage = augment_with_code_coverage(config=config, build_file=build_file, build_type=build_type,
  File "c:\mystuff\mystuffwork\contest\modernization\workspace\tackle-test-generator-cli\tkltest\generate\unit\augment.py", line 70, in augment_with_code_coverage
    __compute_base_and_augmenting_tests_coverage(
  File "c:\mystuff\mystuffwork\contest\modernization\workspace\tackle-test-generator-cli\tkltest\generate\unit\augment.py", line 190, in __compute_base_and_augmenting_tests_coverage
    for dir in [dir for dir in os.listdir(ctd_test_dir) if os.path.isdir(dir) and dir != 'build' and dir != 'target']:
FileNotFoundError: [WinError 3] The system cannot find the path specified: 'onlinebookstore-ctd-amplified-tests'

Attachments

To help us diagnose the failure, please add these attachments to the issue, as appropriate:

The toml file containing the configuration information used
The log file created by running the CLI with the --verbose and --log-level INFO options
If possible, a zip file containing the application classes, and the file specified as app_classpath_file option in the toml file together with the library dependencies listed in the file
If the failure occurred for the generate command, please attach the following files if they were created during the failing run:
- The CTD test plan JSON file (<app-name>_ctd_models_and_test_plans.json)
- The building-block test sequences JSON files (<app-name>_EvoSuiteTestGenerator_bb_test_sequences.json and/or <app-name>_RandoopTestGenerator_bb_test_sequences.json)
If the failure occurred for the execute command, please attach the zip file of the directory containing the generated test JUnit test cases

Environment information

CLI version
OS: [e.g., Linux, macOS, Windows]

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Additional context

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konveyor / tackle-test-generator-cli

TackleTest is failing during augmentation when the ctd-generated test suite is of size zero #313