fix helpers

scripts/_ynh_mysql_connect_as.sh

@@ -28,6 +28,8 @@ ynh_mysql_connect_as() {
     if [ -n "$default_character_set" ]
     then
         default_character_set="--default-character-set=$default_character_set"
+    else
+        default_character_set="--default-character-set=latin1"
     fi
 
     mysql --user="$user" --password="$password" "$default_character_set" --batch "$database"

scripts/_ynh_mysql_dump_db.sh

@@ -23,7 +23,14 @@ ynh_mysql_dump_db() {
     if [ -n "$default_character_set" ]
     then
         default_character_set="--default-character-set=$default_character_set"
+    else
+        # By default, default character set is "latin1"
+        default_character_set="--default-character-set=latin1"
     fi
     
+    if [ -f "$MYSQL_ROOT_PWD_FILE" ]; then
         mysqldump --user="root" --password="$(cat $MYSQL_ROOT_PWD_FILE)" --single-transaction --skip-dump-date "$default_character_set" "$database"
+    else
+        mysqldump --single-transaction --skip-dump-date "$default_character_set" "$database"
+    fi
 }