Fix tests

Author: tiginamaria

http-client/http-client-java/src/test/kotlin/ai/koog/http/client/java/JavaKoogHttpClientTest.kt

@@ -13,7 +13,6 @@ import kotlin.test.Test
 class JavaKoogHttpClientTest : BaseKoogHttpClientTest() {
     override fun createClient(): KoogHttpClient {
         return KoogHttpClient.fromJavaHttpClient(
-            clientName = "TestClient",
             logger = KotlinLogging.logger("TestLogger"),
             httpClient = HttpClient.newHttpClient(),
             json = Json

http-client/http-client-ktor/src/jvmTest/kotlin/ai/koog/http/client/ktor/KtorKoogHttpClientTest.kt

@@ -21,7 +21,6 @@ class KtorKoogHttpClientTest : BaseKoogHttpClientTest() {
     override fun createClient(): KoogHttpClient {
         val baseClient = HttpClient(CIO) {}
         return KoogHttpClient.fromKtorClient(
-            clientName = "TestClient",
             logger = KotlinLogging.logger("TestLogger"),
             baseClient = baseClient
         ) {

http-client/http-client-okhttp/src/test/kotlin/ai/koog/http/client/okhttp/OkHttpKoogHttpClientTest.kt

@@ -14,7 +14,6 @@ class OkHttpKoogHttpClientTest : BaseKoogHttpClientTest() {
 
     override fun createClient(): KoogHttpClient {
         return KoogHttpClient.fromOkHttpClient(
-            clientName = "TestClient",
             logger = KotlinLogging.logger("TestLogger"),
             okHttpClient = OkHttpClient(),
             json = Json

http-client/http-client-test/src/main/kotlin/ai/koog/http/client/test/BaseKoogHttpClientTest.kt

@@ -143,7 +143,7 @@ abstract class BaseKoogHttpClientTest {
             )
             fail("Expected an exception for non-success status")
         } catch (e: KoogHttpClientException) {
-            assertEquals(e.clientName, "TestClient")
+            assertEquals(e.clientName, client::class.simpleName ?: "UnknownClient")
             assertEquals(e.statusCode, 400)
         }
     }