Small fixes

[AsafMah]

• Fixed not correctly awaiting for async token providers to close
• Tests fixes:
  • Use new method for the event loop fixed, since the old one is deprecated
  • Fixed tests not being awaited correctly
  • Fixed exceptions if only some of the env vars are provided

[github-actions[bot]]

Test Results

    6 files  ± 0      6 suites  ±0   22m 57s :stopwatch: + 3m 15s   282 tests  - 16    262 :white_check_mark:  - 15   20 :zzz:  - 1  0 :x: ±0  1 692 runs   - 96  1 572 :white_check_mark:  - 90  120 :zzz:  - 6  0 :x: ±0 

Results for commit b8beb73e. ± Comparison against base commit 1f2c7662.

This pull request removes 16 tests.

azure-kusto-data.tests.test_kusto_connection_string_builder.KustoConnectionStringBuilderTests ‑ test_aad_app
azure-kusto-data.tests.test_kusto_connection_string_builder.KustoConnectionStringBuilderTests ‑ test_aad_app_token
azure-kusto-data.tests.test_kusto_connection_string_builder.KustoConnectionStringBuilderTests ‑ test_aad_device_login
azure-kusto-data.tests.test_kusto_connection_string_builder.KustoConnectionStringBuilderTests ‑ test_aad_user
azure-kusto-data.tests.test_kusto_connection_string_builder.KustoConnectionStringBuilderTests ‑ test_aad_user_token
azure-kusto-data.tests.test_kusto_connection_string_builder.KustoConnectionStringBuilderTests ‑ test_aad_user_with_authority
azure-kusto-data.tests.test_kusto_connection_string_builder.KustoConnectionStringBuilderTests ‑ test_add_async_token_provider
azure-kusto-data.tests.test_kusto_connection_string_builder.KustoConnectionStringBuilderTests ‑ test_add_msi
azure-kusto-data.tests.test_kusto_connection_string_builder.KustoConnectionStringBuilderTests ‑ test_add_token_provider
azure-kusto-data.tests.test_kusto_connection_string_builder.KustoConnectionStringBuilderTests ‑ test_initial_catalog
…

:recycle: This comment has been updated with latest results.