decomposed fs: return reference to parent

[wkloucek]

Description

We've implemented the changes from cs3org/cs3apis#167 in the DecomposedFS, so that a stat on a resource always includes a reference to the parent of the resource.

Related issues

fixes owncloud/ocis#3409
related to:

• Add Reference to the space in ResourceInfo #1804 (comment)
• Use endpoint for cs3ref + use parent_id for relative paths in CS3Iface wopiserver#67 (comment)
• Added parent_id reference to ResourceInfo cs3apis#167

[update-docs]

Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would create a changelog item based on your changes.

[glpatcern]

A priori this commit: 4f44ffc is not needed if you first merge Reva master. And it will create conflicts once you merge master...

[wkloucek]

A priori this commit: 4f44ffc is not needed if you first merge Reva master. And it will create conflicts once you merge master...

cs3org/go-cs3apis@80eca45 is not yet implemented in master. A merge of master to edge would needed to be done in a separate PR, since this too big for the scope of this PR

[glpatcern]

Yes, surely the master merge should be done in a separate PR. Maybe worth doing it beforehand though, or if later then you know you'll have to amend that commit to resolve the inevitable conflict.