Fix "Invalid cookie header" warnings (#791)

Co-authored-by: Günter Grodotzki <gunter@grodotzki.com>

src/main/java/com/cloudbees/jenkins/plugins/bitbucket/server/client/BitbucketServerAPIClient.java

@@ -1038,6 +1038,7 @@ private CloseableHttpClient getHttpClient(final HttpRequestBase request) {
         HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
         httpClientBuilder.useSystemProperties();
         httpClientBuilder.setRetryHandler(new StandardHttpRequestRetryHandler());
+        httpClientBuilder.disableCookieManagement();
 
         RequestConfig.Builder requestConfig = RequestConfig.custom();
         String connectTimeout = System.getProperty("http.connect.timeout", "10");

src/test/java/com/cloudbees/jenkins/plugins/bitbucket/server/client/BitbucketServerAPIClientTest.java

@@ -9,12 +9,15 @@
 import java.util.List;
 import java.util.logging.Level;
 import java.util.stream.Collectors;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClientBuilder;
 import org.junit.Assert;
 import org.junit.Rule;
 import org.junit.Test;
 import org.jvnet.hudson.test.JenkinsRule;
 import org.jvnet.hudson.test.LoggerRule;
 import org.jvnet.hudson.test.WithoutJenkins;
+import org.mockito.MockedStatic;
 
 import static com.cloudbees.jenkins.plugins.bitbucket.server.client.BitbucketServerAPIClient.API_BROWSE_PATH;
 import static org.hamcrest.MatcherAssert.assertThat;
@@ -23,6 +26,10 @@
 import static org.hamcrest.Matchers.hasItem;
 import static org.hamcrest.Matchers.is;
 import static org.hamcrest.Matchers.not;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.mockStatic;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
 
 public class BitbucketServerAPIClientTest {
 
@@ -82,4 +89,16 @@ public void sortRepositoriesByName() throws Exception {
         assertThat(names, is(List.of("another-repo", "dogs-repo", "test-repos")));
     }
 
+    @Test
+    public void disableCookieManager() throws Exception {
+        try(MockedStatic<HttpClientBuilder> staticHttpClientBuilder = mockStatic(HttpClientBuilder.class)) {
+            HttpClientBuilder httpClientBuilder = mock(HttpClientBuilder.class);
+            CloseableHttpClient httpClient = mock(CloseableHttpClient.class);
+            staticHttpClientBuilder.when(HttpClientBuilder::create).thenReturn(httpClientBuilder);
+            when(httpClientBuilder.build()).thenReturn(httpClient);
+            BitbucketApi client = BitbucketIntegrationClientFactory.getClient("localhost", "amuniz", "test-repos");
+            client.getRepositories();
+            verify(httpClientBuilder).disableCookieManagement();
+        }
+    }
 }