CLOUDSTACK-8696: Port Rajani's regions fix to 451to452 sql upgrade path

Upgrade paths from 4.5.1 exists to both 4.5.2, and 4.6.0. Since 4.5.2 and 4.6.0
are not release, and the bug affects 4.5 branch; this patch aims to port that
fix from master to both 4.5/master branches.

Ported from commit b6a7804

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Author: yadvr

setup/db/db/schema-451to452.sql

@@ -33,3 +33,7 @@ CREATE TABLE `cloud`.`saml_token` (
   PRIMARY KEY (`id`),
   CONSTRAINT `fk_saml_token__domain_id` FOREIGN KEY(`domain_id`) REFERENCES `domain`(`id`) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+
+SET foreign_key_checks = 0;
+ALTER TABLE `cloud`.`region` MODIFY `id` int unsigned UNIQUE NOT NULL;
+SET foreign_key_checks = 1;

setup/db/db/schema-452to460.sql

@@ -399,6 +399,3 @@ CREATE TABLE `cloud`.`external_bigswitch_bcf_devices` (
   CONSTRAINT `fk_external_bigswitch_bcf_devices__physical_network_id` FOREIGN KEY (`physical_network_id`) REFERENCES `physical_network`(`id`) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
-SET foreign_key_checks = 0;
-ALTER TABLE `cloud`.`region` MODIFY `id` int unsigned UNIQUE NOT NULL;
-SET foreign_key_checks = 1;