get cloud host from client builder

Author: mq200

src/main/java/ee/carlrobert/llm/client/watsonx/WatsonxClient.java

@@ -30,14 +30,13 @@ public class WatsonxClient {
         private WatsonxClient(Builder builder, OkHttpClient.Builder httpClientBuilder) {
             this.httpClient = httpClientBuilder.build();
             this.apiVersion = builder.apiVersion;
+            this.host = builder.host;
             if (builder.isOnPrem) {
-                this.host = builder.host;
                 if (builder.isZenApiKey)
                     this.authenticator = new WatsonxAuthenticator(builder.username, builder.apiKey);
                 else
                     this.authenticator = new WatsonxAuthenticator(builder.username, builder.apiKey, builder.host);
             } else {
-                this.host = PropertiesLoader.getValue("watsonx.baseUrl");
                 this.authenticator = new WatsonxAuthenticator(builder.apiKey);
             }
         }