stack.erp5: Speed up mysqldump restoration.

Disable more mariadb options during backup restoration:
- relax durability
- disable binlogs
- disable slow log
Bits of this commit were already accidentally (but harmlessly) pushed as
part of
  commit 5bde847f
  Author: Vincent Pelletier <vincent@nexedi.com>
  Date:   Tue Feb 21 16:02:21 2017 +0900

    stack.erp5: Avoid duplicating mariadb service paths.

stack/erp5/buildout.hash.cfg

@@ -15,7 +15,7 @@
 # not need these here).
 [mariadb-resiliency-after-import-script]
 filename = instance-mariadb-resiliency-after-import-script.sh.in
-md5sum = 394109d9373f4375d5e1599d5d1500ac
+md5sum = bec57f6fcbcad64e734e0ebdac6a1618
 
 [template-mariadb]
 filename = instance-mariadb.cfg.in

stack/erp5/instance-mariadb-resiliency-after-import-script.sh.in

@@ -46,7 +46,7 @@ fi
 
 echo "Starting mariadb..."
 # XXX hardcoded
-"$server_executable" --innodb-flush-method=nosync --skip-innodb-doublewrite &
+"$server_executable" --innodb-flush-method=nosync --skip-innodb-doublewrite --innodb-flush-log-at-trx-commit=0 --sync-frm=0 --slow-query-log=0 --skip-log-bin &
 mysqld_pid=$!
 trap "kill $mysqld_pid" EXIT TERM INT
 sleep 30