Fix/deletion of index (#178)

* feat: additional data extraction

* fix: build fix

* fix: build fix

* fix: build fix

* fix: build fix

* fix: build fix

* fix: build fix

* fix: build fix

* fix: build fix

* Update tests/test_additional_data_extraction.py

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* fix: delete duplicated license

* fix: delete last indexes

* fix: delete index for every scenario without regex

* fix: delete index for every scenario without regex

Co-authored-by: weliasz <weliasz@splunk.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

splunk_connect_for_snmp_poller/manager/hec_sender.py

@@ -210,6 +210,7 @@ def build_metric_data(
 def extract_additional_properties(fields, metric_name, metric_value, server_config):
     result = multi_key_lookup(server_config, (enricher_name, enricher_oid_family))
     oid_families = result if result else []
+    any_regex_matched = False
 
     for family in oid_families.keys():
         if metric_name.startswith("sc4snmp." + family):
@@ -226,6 +227,7 @@ def extract_additional_properties(fields, metric_name, metric_value, server_conf
 
                     result = re.match(regex, input_text)
                     if result:
+                        any_regex_matched = True
                         for index, item in enumerate(names_list):
                             fields[item] = result.group(index + 1)
                         del fields["metric_name:" + metric_name]
@@ -234,6 +236,11 @@ def extract_additional_properties(fields, metric_name, metric_value, server_conf
                         fields["old_metric_name:" + metric_name] = metric_value
                         continue
 
+            if not any_regex_matched:
+                fields["index_number"] = input_text
+                del fields["metric_name:" + metric_name]
+                fields["metric_name:" + stripped] = metric_value
+
 
 def build_error_data(
     host,