Fix test to do proper cleanup.

mysql-test/suite/encryption/t/innodb-bad-key-change3.test

@@ -89,6 +89,19 @@ SELECT * FROM t1;
 --echo # t1 yes on expecting NOT FOUND
 -- let SEARCH_FILE=$t1_IBD
 -- source include/search_pattern_in_file.inc
+
+--exec echo "wait" > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect
+--shutdown_server
+--source include/wait_until_disconnected.inc
+--remove_file $MYSQLTEST_VARDIR/keys1.txt
+--write_file $MYSQLTEST_VARDIR/keys1.txt
+1;770A8A65DA156D24EE2A093277530142
+4;770A8A65DA156D24EE2A093277530143
+EOF
+
+--exec echo "restart:--innodb-encrypt-tables --innodb-stats-persistent --plugin-load-add=file_key_management.so --file-key-management --file-key-management-filename=$MYSQLTEST_VARDIR/keys1.txt" > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect
+--enable_reconnect
+--source include/wait_until_connected_again.inc
 DROP TABLE t1;
 
 # reset system