Added JS unit tests for the external storage file list extension.

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

The updater is using "before update" repair steps and "regular" repair
steps.
The "regular" repair steps are also used by the CLI tool.

Currently no steps exist but can be added later in the static methods in
the \OC\Repair class.

Added unit test to test messaging, error and exception cases.

Some tests don't clean up the file cache and sometimes entries are
reused by mistake in subsequent test suites.

This cleans up the file cache and storage after every test suite and
also shows an annoying warning.

Sometimes etags contain a "e" character which makes PHP believe it's a
number and make the tests fail

adding auto increment/PK to table files_trash

adding PK to table ldap_user_mapping and ldap_group_members

adding PK to table ldap_group_mapping

truncate permissions table to allow smooth creation of primary key

adding unit test for creating an auto increment column on a table which already contains data

remove unneeded table files_trashsizes

fix unit test

no need to truncate *PREFIX*permissions

On Oracle adding auto increment columns is not working out of the box - Oracle migrations are to be done manually

- the file/folder's permission is now stored in the file cache
- BackGroundWatcher has been removed - this has meanwhile be replaced by occ files:scan which can be executed in a cron jobs
- increase version to trigger database migration

This includes all mountpoints except the Shared one in
the used space calculation.

Added unit tests for ext storage inclusion in quota calculation

Updating SabreDAV namespaces

Add a mechanism to try the database migration on a copy of the tables before running it on the "real" data