Added missing tests for multiple records

LGTM.

In D6220#160865, @aeviso wrote:

Not sure we really want to restrict this methods to test-only in the documentation. But we can change this in the future anyway

In D6220#160846, @douardda wrote:

Please use imperative style in the got commit message
https://chris.beams.io/posts/git-commit/

Docstring changes for test only methods (Minor).

In T3405#67656, @anlambert wrote:

I stumbled across GitLab GraphQL API while working on T3442, could be a great source of inspiration.

Initial version is merged to master.

First test. (fir 1K likes from the 10K set)
Computer: Dell 7400

MongoDB backend implementation for provenancestorage.

• Added the necessary directory for mongo pytest to work

MongoDB backend implementation for provenancestorage.

• Made default provenance storage to psql

• Pytest is using mongomock

@vsellier I am not sure about this.
The idea is to use this machine as the production server. (I guess this will host either postgres or mongodb after we decide on a preferred backend. But that is going to take some time)
@olasd or @aeviso will know better.

LGTM

Data model
initial

content {
        id: sha1
        ts    // optional
        revision: {<ref revision str>: [<ref path>]}
        directory: {<ref directory str>: [<ref path>]}
        }

review changes

added copyright text

template changes, removed tabs

template issues corrected

e18341dd82c1

Looks good to me, thanks ! There is still a typo remaining on an exception name, see inline comment.

Thanks. Fixed e18341dd82c1

Review changes

Requested changes

Couple of remarks inline.

@thanks. Updated the version

Suggested changes by @ardumont

In D5828#149939, @anlambert wrote:

Looks good to me ! You can now merge your feature branch in the master one and push it to remote, phabricator will automatically close the diff afterwards.

Incorporating suggested changes and improved commit message

Synatax corrections

Changed Promise to use async/await.

Updating to changes from origin/master