docs(README): Add snippet about ICP auth

Author: lpatino10

README.md

@@ -20,6 +20,7 @@ Java client library to use the [Watson APIs][wdc].
   * [Authentication](#authentication)
     * [IAM](#iam)
     * [Username and password](#username-and-password)
+    * [ICP](#icp)
     * [Cloud Pak for Data](#cloud-pak-for-data)
   * [Using the SDK](#using-the-sdk)
     * [Parsing responses](#parsing-responses)
@@ -197,6 +198,20 @@ Authenticator authenticator = new BasicAuthenticator("<username>", "<password>")
 Discovery service = new Discovery("2017-11-07", authenticator);
 ```
 
+#### ICP
+Authenticating with ICP is similar to the basic username and password method, except that you need to make sure to disable SSL verification to authenticate properly. See [here](#configuring-the-http-client) for more information.
+
+```java
+Authenticator authenticator = new BasicAuthenticator("<username>", "<password>");
+Discovery service = new Discovery("2017-11-07", authenticator);
+
+HttpConfigOptions options = new HttpConfigOptions.Builder()
+  .disableSslVerification(true)
+  .build();
+
+service.configureClient(options);
+```
+
 #### Cloud Pak for Data
 Like IAM, you can pass in credentials to let the SDK manage an access token for you or directly supply an access token to do it yourself.