mysql schema: Introduce `id' and `group_id'
Required to ensure referential integrity when renaming groups. refs #8826
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# Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+
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CREATE TABLE `icingaweb_group`(
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`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
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`name` varchar(64) COLLATE utf8_unicode_ci NOT NULL,
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`parent` varchar(64) COLLATE utf8_unicode_ci NULL DEFAULT NULL,
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`ctime` timestamp NULL DEFAULT NULL,
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`mtime` timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
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PRIMARY KEY (`name`)
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PRIMARY KEY (`id`),
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UNIQUE KEY `idx_name` (`name`)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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CREATE TABLE `icingaweb_group_membership`(
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`group_name` varchar(64) COLLATE utf8_unicode_ci NOT NULL,
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`group_id` int(10) unsigned NOT NULL,
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`username` varchar(64) COLLATE utf8_unicode_ci NOT NULL,
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`ctime` timestamp NULL DEFAULT NULL,
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`mtime` timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
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PRIMARY KEY (`group_name`,`username`),
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CONSTRAINT `fk_icingaweb_group_membership_icingaweb_group` FOREIGN KEY (`group_name`)
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REFERENCES `icingaweb_group` (`name`)
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PRIMARY KEY (`group_id`,`username`),
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CONSTRAINT `fk_icingaweb_group_membership_icingaweb_group` FOREIGN KEY (`group_id`)
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REFERENCES `icingaweb_group` (`id`)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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CREATE TABLE `icingaweb_user`(
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