fix rebase, use 'object::user:<username>' or 'object::store:<storageid> as storage id, by default use container/bucket name for storageid, make storageid configurable, store user only for HomeObjectStoreStorage, change updateObject() to writeObject()

add autocreate config option for containers, implement autocreate and delete of containers, use generated container names for tests

fix checking unset array values, deduplicate code, remove file from cache if it could not be stored in the objectstore

copy skeleton only for local filesystems

Load fundamental apps, before any possible customizing app may follow

Add server<->server sharing

Do not rename primary key index when renaming table

Obviously have to pass the hostname as is when there is no ':' in the hostname

Migrate table layout to p layout for share settings

Added unit test to make sure that checkMigrate() works when adding a
primary key and autoincrement column to a table schema.

When the migrator renames a table, for example for upgrade simulation,
it should not rename the primary key to avoid messing up with the diff
because the MySQL Doctrine code expects that index to always be called
"primary".

This reverts commit 73062040.

ref #8906