clone depth of 1 and execute integration tests first

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[uc] Improve chunk upload AssemblyStream performance

Fix getMock phpunit warnings

Allow increasing permissions for share owner

* specify git image

In some cases, the owner of the share is also recipient through a group
share. The owner must still be able to increase permissions in that
situation.

Update drone.yml to 0.5

Fix failing preview unit tests

Choose button remains disbaled for httpd/unix-directory

Fix codesniffer complains on some apps