AMBARI-9295. Remove toLowerCase() from userPrincipalName in default Kerberos principal create template (rlevas)

ambari-server/src/main/java/org/apache/ambari/server/serveraction/kerberos/ADKerberosOperationHandler.java

@@ -502,7 +502,7 @@ public class ADKerberosOperationHandler extends KerberosOperationHandler {
           "#if( $is_service )" +
           "  \"servicePrincipalName\": \"$principal_name\"," +
           "#end" +
-          "\"userPrincipalName\": \"$normalized_principal.toLowerCase()\"," +
+          "\"userPrincipalName\": \"$normalized_principal\"," +
           "\"unicodePwd\": \"$password\"," +
           "\"accountExpires\": \"0\"," +
           "\"userAccountControl\": \"66048\"" +

ambari-server/src/main/resources/common-services/KERBEROS/1.10.3-10/configuration/kerberos-env.xml

@@ -53,7 +53,7 @@
   #if( $is_service )
   "servicePrincipalName": "$principal_name",
   #end
-  "userPrincipalName": "$normalized_principal.toLowerCase()",
+  "userPrincipalName": "$normalized_principal",
   "unicodePwd": "$password",
   "accountExpires": "0",
   "userAccountControl": "66048"

ambari-server/src/test/java/org/apache/ambari/server/serveraction/kerberos/ADKerberosOperationHandlerTest.java

@@ -300,7 +300,7 @@ public class ADKerberosOperationHandlerTest extends EasyMockSupport {
     Assert.assertEquals("nn/c6501.ambari.apache.org", attributes.get("servicePrincipalName").get());
 
     Assert.assertNotNull(attributes.get("userPrincipalName"));
-    Assert.assertEquals("nn/c6501.ambari.apache.org@hdp01.local", attributes.get("userPrincipalName").get());
+    Assert.assertEquals("nn/c6501.ambari.apache.org@HDP01.LOCAL", attributes.get("userPrincipalName").get());
 
     Assert.assertNotNull(attributes.get("unicodePwd"));
     Assert.assertEquals("\"secret\"", new String((byte[]) attributes.get("unicodePwd").get(), Charset.forName("UTF-16LE")));
@@ -325,7 +325,7 @@ public class ADKerberosOperationHandlerTest extends EasyMockSupport {
     Assert.assertEquals("hdfs", attributes.get("cn").get());
 
     Assert.assertNotNull(attributes.get("userPrincipalName"));
-    Assert.assertEquals("hdfs@hdp01.local", attributes.get("userPrincipalName").get());
+    Assert.assertEquals("hdfs@HDP01.LOCAL", attributes.get("userPrincipalName").get());
 
     Assert.assertNotNull(attributes.get("unicodePwd"));
     Assert.assertEquals("\"secret\"", new String((byte[]) attributes.get("unicodePwd").get(), Charset.forName("UTF-16LE")));
@@ -358,7 +358,7 @@ public class ADKerberosOperationHandlerTest extends EasyMockSupport {
             "  #if( $is_service )" +
             "  \"servicePrincipalName\": \"$principal_name\"," +
             "  #end" +
-            "  \"userPrincipalName\": \"$normalized_principal.toLowerCase()\"," +
+            "  \"userPrincipalName\": \"$normalized_principal\"," +
             "  \"unicodePwd\": \"$password\"," +
             "  \"accountExpires\": \"0\"," +
             "  \"userAccountControl\": \"66048\"" +
@@ -424,7 +424,7 @@ public class ADKerberosOperationHandlerTest extends EasyMockSupport {
     Assert.assertEquals("nn/c6501.ambari.apache.org", attributes.get("servicePrincipalName").get());
 
     Assert.assertNotNull(attributes.get("userPrincipalName"));
-    Assert.assertEquals("nn/c6501.ambari.apache.org@hdp01.local", attributes.get("userPrincipalName").get());
+    Assert.assertEquals("nn/c6501.ambari.apache.org@HDP01.LOCAL", attributes.get("userPrincipalName").get());
 
     Assert.assertNotNull(attributes.get("sAMAccountName"));
     Assert.assertTrue(attributes.get("sAMAccountName").get().toString().length() <= 20);
@@ -504,7 +504,7 @@ public class ADKerberosOperationHandlerTest extends EasyMockSupport {
             "  #if( $is_service )" +
             "  \"servicePrincipalName\": \"$principal_name\"," +
             "  #end" +
-            "  \"userPrincipalName\": \"$normalized_principal.toLowerCase()\"," +
+            "  \"userPrincipalName\": \"$normalized_principal\"," +
             "  \"unicodePwd\": \"$password\"," +
             "  \"accountExpires\": \"0\"," +
             "  \"userAccountControl\": \"66048\"" +