add escape for request

scripts/install

@@ -160,7 +160,7 @@ surname=$(ynh_user_get_info $admin lastname)
 name=$(ynh_user_get_info $admin firstname)
 
 mysql -u$db_user -p$db_pwd $db_name -e "INSERT INTO \`users\` (\`userid\`,\`alias\`, \`name\`, \`surname\`, \`passwd\`, \`url\`, \`autologin\`, \`autologout\`, \`lang\`, \`refresh\`, \`type\`, \`theme\`, \`attempt_failed\`, \`attempt_ip\`, \`attempt_clock\`, \`rows_per_page\`) VALUES (3,'"$admin"', '"$admin"', '"$admin"', '5fce1b3e34b520afeffb37ce08c7cd66', '', 0, '0', '"$lang"', '30s', 3, 'default', 0, '', 0, 50);"
-mysql -u$db_user -p$db_pwd $db_name -e "INSERT INTO `users_groups` (`id`, `usrgrpid`, `userid`) VALUES (5, 7, 3);"
+mysql -u$db_user -p$db_pwd $db_name -e "INSERT INTO \`users_groups\` (\`id\`, \`usrgrpid\`, \`userid\`) VALUES (5, 7, 3);"
 
 #users creation
 i=4