feat: add new sdk method to update instance home credentials

add new sdk method to update instance home credentials.

Signed-off-by: Silpi Dhua <[email protected]>

Author: silpidhua

modules/ibm-analytics-engine-api/src/test/java/com/ibm/cloud/iaesdk/ibm_analytics_engine_api/v2/IbmAnalyticsEngineApiTest.java

@@ -65,10 +65,6 @@
 import okhttp3.mockwebserver.MockResponse;
 import okhttp3.mockwebserver.MockWebServer;
 import okhttp3.mockwebserver.RecordedRequest;
-import org.powermock.api.mockito.PowerMockito;
-import org.powermock.core.classloader.annotations.PowerMockIgnore;
-import org.powermock.core.classloader.annotations.PrepareForTest;
-import org.powermock.modules.testng.PowerMockTestCase;
 import org.testng.annotations.AfterMethod;
 import org.testng.annotations.BeforeMethod;
 import org.testng.annotations.Test;