upgrade: kvm-local-pool-trailing-slash (#3813)

Stop asking user (in the upgrade documentation) to remove a trailing slash for local KVM pool - do it here in upgrade path - so not needed in DOC for the upgrade to 4.14 and onwards.

Author: andrijapanicsb

engine/schema/src/main/resources/META-INF/db/schema-41300to41400-cleanup.sql

@@ -20,3 +20,6 @@
 --;
 
 DELETE FROM `cloud`.`configuration` WHERE name = 'host.maintenance.retries';
+
+-- Stop asking user (in the upgraded documentation) to remove a trailing slash for local KVM pool
+UPDATE `cloud`.`storage_pool` SET path="/var/lib/libvirt/images" WHERE path="/var/lib/libvirt/images/";