mtr: mysqld--help-aria test on OSX fail

Previous test failure:

--- /Users/travis/build/grooverdan/mariadb-server/mysql-test/main/mysqld--help-aria.result	2020-04-29 03:44:40.000000000 +0000
+++ /Users/travis/build/grooverdan/mariadb-server/mysql-test/main/mysqld--help-aria.reject	2020-04-29 04:19:13.000000000 +0000
@@ -1,3 +1,4 @@
+[Warning] Setting lower_case_table_names=2 because file system for /Users/travis/build/grooverdan/mariadb-server/mysql-test/var/4/mariadbd.1/data/ is case insensitive
 [ERROR] mariadbd: Can't lock aria aria_log_control for exclusive use, error: #. Will retry for 0 seconds
 [ERROR] Plugin 'Aria' init function returned error.
 [ERROR] Plugin 'Aria' registration as a STORAGE ENGINE failed.
@@ -9,4 +10,5 @@
 #
 # Check with existing directory
 #
+[Warning] Setting lower_case_table_names=2 because file system for /Users/travis/build/grooverdan/mariadb-server/mysql-test/var/tmp/4/help/ is case insensitive
 [Warning] Could not open mysql.plugin table: "Table 'mysql.plugin' doesn't exist". Some options may be missing from the help text

mysql-test/main/mysqld--help-aria.test

@@ -7,7 +7,7 @@
 
 --source include/not_windows.inc
 
---let $args=--table-cache=5 --max-connections=10 --log-warnings=1 --silent-startup --help --verbose
+--let $args=--table-cache=5 --max-connections=10 --log-warnings=1 --silent-startup --lower-case-table-names=1 --help --verbose
 
 --exec $MYSQLD_CMD $args > $MYSQL_TMP_DIR/mysqld--help2.txt 2> $MYSQL_TMP_DIR/mysqld--help2.err
 --replace_regex /mysqld/mariadbd/ /\d\d\d\d-\d*-\d* *\d*:\d*:\d* \d* // /control file '.*aria_log_control'/aria_log_control/ /error: \d+/error: #/