JENKINS-46445 Add support for both client TLS and basic authentication.

In some setups both client certificate TLS authentication and
username password authentication is needed.

Here is how you would set it up.

Create a sslContext, and add it along with credentials this way

HttpClientBuilder builder = HttpClientBuilder.create();
builder.setSslcontext(sslContext);
JenkinsHttpClient client = new JenkinsHttpClient(uri, builder, username, password);
JenkinsServer jenkins = new JenkinsServer(client);

Author: Jesper Terkelsen

jenkins-client/src/main/java/com/offbytwo/jenkins/client/JenkinsHttpClient.java

@@ -122,6 +122,22 @@ public JenkinsHttpClient(URI uri, String username, String password) {
         }
     }
 
+    /**
+     * Create an authenticated Jenkins HTTP client
+     *
+     * @param uri Location of the jenkins server (ex. http://localhost:8080)
+     * @param builder Configured HttpClientBuilder to be used
+     * @param username Username to use when connecting
+     * @param password Password or auth token to use when connecting
+     */
+    public JenkinsHttpClient(URI uri, HttpClientBuilder builder, String username, String password) {
+        this(uri, addAuthentication(builder, uri, username, password));
+        if (isNotBlank(username)) {
+            localContext = new BasicHttpContext();
+            localContext.setAttribute("preemptive-auth", new BasicScheme());
+        }
+    }
+
     /**
      * Perform a GET request and parse the response to the given class
      *