fix: terminate tests for improper props conf (#901)

props.conf had invalid syntax using line breakers (issue reported here:
https://splunk.atlassian.net/browse/ADDON-72549
). The incorrect format is causing warnings in the splunkd log, which
could be easily prevented by correcting the props conf file like in this
[example](https://github.com/splunk/splunk-add-on-for-microsoft-cloud-services/pull/1196/files).

Related Jira:
https://splunk.atlassian.net/browse/ADDON-77954

Example local run: 
<img width="1707" alt="image"
src="https://github.com/user-attachments/assets/33e5247b-0f93-494c-9685-a48ddfb43a67"
/>

Author: kdoroszko-splunk

pytest_splunk_addon/addon_parser/transforms_parser.py

@@ -23,6 +23,7 @@
 import re
 import os
 import csv
+import sys
 
 import addonfactory_splunk_conf_parser_lib as conf_parser
 
@@ -114,6 +115,9 @@ def get_transform_fields(self, transforms_stanza: str) -> Optional[Generator]:
             LOGGER.error(
                 f"The stanza {transforms_stanza} does not exists in transforms.conf."
             )
+            sys.exit(
+                f"The stanza {transforms_stanza} does not exists in transforms.conf."
+            )
 
     def get_lookup_csv_fields(self, lookup_stanza: str) -> Optional[Generator]:
         """

tests/e2e/addons/TA_broken/default/props.conf

@@ -58,8 +58,7 @@ LOOKUP-PASS_test_lookup_not_found = broken-NaN_lookup FAIL_component FAIL_broken
 REPORT-broken-FAIL_tsc-delim-fields = broken-tsc-delim-fields
 REPORT-broken-PASS_tsc-sk-regex-format = broken-tsc-sk-regex-format
 REPORT-broken-FAIL_tsc-sk-delim-format = broken-contact_mode_extract
-# If a non_existing stanza is present then no testcases are generated for it.
-REPORT-broken-FAIL_tsc-regex-format = broken-tsc-regex-format, broken-non_existing_transforms_stanza
+REPORT-broken-FAIL_tsc-regex-format = broken-tsc-regex-format
 
 # Component tested: FIELDALIAS
 # Scenario: Plugin searches for the original field and one or more alias field names.

tests/unit/tests_standard_lib/test_addon_parser/test_transforms_parser.py

@@ -61,13 +61,14 @@ def test_no_transforms_config_file():
     assert transforms_parser.transforms is None
 
 
-def test_stanza_does_not_exist_in_transforms(caplog):
+def test_stanza_does_not_exist_in_transforms():
     transforms_conf_path = os.path.join(os.path.dirname(__file__), "testdata")
     transforms_parser = TransformsParser(transforms_conf_path)
-    for result in transforms_parser.get_transform_fields("dummy_stanza"):
-        assert result is None
-    assert (
-        "The stanza dummy_stanza does not exists in transforms.conf." in caplog.messages
+    with pytest.raises(SystemExit) as excinfo:
+        for result in transforms_parser.get_transform_fields("dummy_stanza"):
+            assert result is None
+    assert "The stanza dummy_stanza does not exists in transforms.conf." == str(
+        excinfo.value
     )