AMBARI-15790 Clean up stack scripts that refer to dfs.nameservices to use dfs.internal.nameservices as first option (unit test fix) (dsen)

ambari-server/src/test/java/org/apache/ambari/server/state/UpgradeHelperTest.java

@@ -1575,7 +1575,7 @@ public class UpgradeHelperTest {
     assertEquals(2, schs.size());
 
     setConfigMocks();
-    expect(m_configHelper.getValueFromDesiredConfigurations(c, "hdfs-site", "dfs.nameservices")).andReturn("ha").anyTimes();
+    expect(m_configHelper.getValueFromDesiredConfigurations(c, "hdfs-site", "dfs.internal.nameservices")).andReturn("ha").anyTimes();
     expect(m_configHelper.getValueFromDesiredConfigurations(c, "hdfs-site", "dfs.ha.namenodes.ha")).andReturn("nn1,nn2").anyTimes();
     expect(m_configHelper.getValueFromDesiredConfigurations(c, "hdfs-site", "dfs.http.policy")).andReturn("HTTP_ONLY").anyTimes();