TT#122035 Allow ngcp-synd-db to sync passwords from db01 on Carrier

The bullsyeye-based MariaDB 10.5.9 has invalid root password set by default.
It is not possible to connect DB instance from network, the only option is
to connect DB instance through the socket.

The ngcp-installer calls ngcp-sync-db to replicate db01:3306->prx01:3308
on proxy node for the Carrier case. We have to open networking root access
temporary. ngcp-sync-db will replicate 'root' password from db01 the next moment.

Also update '1>/dev/null 2>/dev/null' to Sipwise style '&>/dev/null'.

Change-Id: I12ff71efdd8283531f03ceaf87345f3cc4e71419

ngcp-update-db-schema

@@ -54,7 +54,7 @@ declare -a MYSQL_OPTS=()
 MYSQL_OPTS+=("--defaults-extra-file=${SIPWISE_EXTRA_CNF}")
 
 # check connection with sipwise user
-if ! mysql "${MYSQL_OPTS[@]}" -e 'SELECT 1;' 1>/dev/null 2>/dev/null ; then
+if ! mysql "${MYSQL_OPTS[@]}" -e 'SELECT 1;' &>/dev/null ; then
   echo "Error: can't connect to local MariaDB port 3306 using '${SIPWISE_EXTRA_CNF}'" >&2
   exit 1
 fi
@@ -250,6 +250,19 @@ revision_wrapper $(printf '%s\0' *.up | sort -z -n | while IFS= read -r -d "" fi
 
 # for carrier prx* hosts sync master-slave replication for not_replicated statements (if any)
 if $RUN_SYNC_DB && ($NOT_REPLICATED_REV_APPLIED || [ -n "$AUTOMATED_INSTALL_MODE" ]); then
+
+  # check connection to MariaDB on port 3308 using socket to bypass auth as root has invalid password
+  if ! mysql -S /run/mysqld/mysqld2.sock -e 'SELECT 1;' &>/dev/null ; then
+    echo "Error: can't connect to local MariaDB:3308 using socket '/run/mysqld/mysqld2.sock'" >&2
+    exit 1
+  fi
+
+  # Reset 'root' password temporary to allow ngcp-sync-db replicate all credentials from db01
+  if ! mysql -S /run/mysqld/mysqld2.sock -e "SET PASSWORD FOR root@localhost = '';" 2>/dev/null ; then
+    echo "Error: Failed to temporary reset password for user 'root' on MariaDB:3308" >&2
+    exit 1
+  fi
+
   if [ -x "$SYNC_DB" ] ; then
       PRX_SYNC_DBS="ngcp billing carrier kamailio provisioning prosody mysql"
       PRX_IGNORE_TABLES="kamailio.voicemail_spool"