This commit introduces a new DB function called `isSharedWith`
that can be used to check for team/public/private nodes and their
shared resources.

(no default getCurrentTime anymore)

This is a first stepping stone in avoiding bugs by having `UserId` and
`ContextId` being proper types, and not synonyms.

We also refactor things to have `AuthenticatedUser` carry the `UserId`.

Basically, Gargantext.Prelude exports all of Protolude now.

- DBCmd instead of Cmd
- remove FlowCmdM in favor of HasNodeStory

This commit partially undo the access policy checks for the
GraphQL endpoints, until we find a better story to correlate
the `user_id` we sometimes receive with the info from the
`AuthenticatedUser`.

This commit makes the `GET /api/v1.0/version` test more lax, and less
prone to break on version bumps.

It can be used to "bolt-on" policy checking into Servant API routes.

Tests were written with a very flat module hierarchy which made them
a bit confusing to navigate. This commit moves everything under a common
`Test.*` hierarchy.

This commit also uses a temporary fork of boolexpr.
It allows to parse certain terms like "Niki" without choking.

We now require CoreNLP listening on port :9000. We will have to find
a way to spin that up in CI as well.

This commit refactors the codebase to add a new function called
`addDocumentsToHyperCorpus` which generalises the common pattern of
calling `insertMasterDocs` and later adding the documents via the DB
`Doc` functions.

It also "lowers" some functions to run into a plain `DBCmd`.

Alas I (Alfredo) had to split the runners for tasty and hspec because in
tasty we cannot control explicitly the level of parallelism, but for the
DB stuff we need sequential tests, whereas for the Jobs tests we need
parallelism, or rather the executable to be compiled with `-threaded`.