Fix NPE in logic that parses flaky tests list

Author: nikita-tkachenko-datadog

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/config/ConfigurationApiImpl.java

@@ -211,12 +211,14 @@ public Map<String, Collection<TestIdentifier>> getFlakyTestsByModule(
 
     LOGGER.debug("Received {} flaky tests in total", response.size());
 
+    Configurations requestConf = tracerEnvironment.getConfigurations();
+
     int flakyTestsCount = 0;
     Map<String, Collection<TestIdentifier>> testIdentifiers = new HashMap<>();
     for (DataDto<TestIdentifierJson> dataDto : response) {
       TestIdentifierJson testIdentifierJson = dataDto.getAttributes();
-      Configurations configurations = testIdentifierJson.getConfigurations();
-      String moduleName = configurations.getTestBundle();
+      Configurations conf = testIdentifierJson.getConfigurations();
+      String moduleName = (conf != null ? conf : requestConf).getTestBundle();
       testIdentifiers
           .computeIfAbsent(moduleName, k -> new HashSet<>())
           .add(testIdentifierJson.toTestIdentifier());