Fix typo in test

The test was supposed to error but didn't.  Apparently, a copy and
paste and string replace mistake from a nearby similar test.

Author: petere

src/test/modules/unsafe_tests/expected/rolenames.out

@@ -429,7 +429,10 @@ SELECT * FROM chksetconfig();
 ----+------+------------+-----------
 (0 rows)
 
-ALTER USER CURRENT_USER SET application_name to 'BAZ'; -- error
+ALTER USER CURRENT_ROLE SET application_name to 'BAZ'; -- error
+ERROR:  syntax error at or near "CURRENT_ROLE"
+LINE 1: ALTER USER CURRENT_ROLE SET application_name to 'BAZ';
+                   ^
 ALTER USER USER SET application_name to 'BOOM'; -- error
 ERROR:  syntax error at or near "USER"
 LINE 1: ALTER USER USER SET application_name to 'BOOM';

src/test/modules/unsafe_tests/sql/rolenames.sql

@@ -180,7 +180,7 @@ ALTER USER ALL RESET application_name;
 SELECT * FROM chksetconfig();
 
 
-ALTER USER CURRENT_USER SET application_name to 'BAZ'; -- error
+ALTER USER CURRENT_ROLE SET application_name to 'BAZ'; -- error
 ALTER USER USER SET application_name to 'BOOM'; -- error
 ALTER USER PUBLIC SET application_name to 'BOMB'; -- error
 ALTER USER NONE SET application_name to 'BOMB'; -- error