Updated XML and CSV example files for user import to reflect explanation text - related to CT#1454

main/admin/example.csv

@@ -1,3 +1,3 @@
-LastName;FirstName;UserName;Password;Email;OfficialCode;PhoneNumber;Status;Courses
-Mcfly;Marty;marty;secret;marty@example.com;12345678;001-123-456-789;user;COURSE1|COURSE2|COURSE3
-Brown;Emmert;emmert;;drbrown@example.net;;;teacher;COURSE2
+LastName;FirstName;Email;UserName;Password;AuthSource;OfficialCode;PhoneNumber;Status;Courses
+Mcfly;Marty;marty@example.com;marty;secret;platform;12345678;001-123-456-789;user;COURSE1|COURSE2|COURSE3
+Brown;Emmert;drbrown@example.net;emmert;;platform;;;teacher;COURSE2

main/admin/example.xml

@@ -5,6 +5,7 @@
         <FirstName>Marty</FirstName>
         <UserName>marty</UserName>
         <Password>secret</Password>
+	<AuthSource>platform</AuthSource>
         <Email>marty@example.net</Email>
         <OfficialCode>12345678</OfficialCode>
         <PhoneNumber>001-123-456-789</PhoneNumber>
@@ -16,6 +17,7 @@
         <FirstName>Emmett</FirstName>
         <UserName>emmett</UserName>
         <Password>secret</Password>
+	<AuthSource>platform</AuthSource>
         <Email>drbrown@example.net</Email>
         <OfficialCode />
         <PhoneNumber />