Update the expected user parameter from "user_id" to "user"

This is necessary because the default permissions class for this repo
uses a hard-coded key "user" to check the user against the JWT token.

Use an absolute path for the templates dir

For some reason, this was necessary for the notes IDA in devstack,
otherwise it would just throw TemplateDoesNotExist.  It's so specific
that it shoudln't impact stage or prod which already seem to work
without this.

Also migrate TEMPLATE_DIRS variable to non-deprecated TEMPLATES
variable.

add settings for devstack

Add "migrate" and "static" make targets for devstack integration

At the time of writing, these targets are required by devstack's
provision-ida.sh script.

Install release_util for deployment pipeline compliance

Now that we are trying to deploy this IDA via pipelines, it needs some
extra management commands provided by release_util.

Dont start newrelic transaction on heartbeat

Notes API add endpoint to delete all notes for a user

https://openedx.atlassian.net/browse/EDUCATOR-2657

[DELAY MERGE] TNL-6145: Upgrade ES to 1.x for notes

Elasticsearch 0.90.x is quite out-of-date, and this requirement is preventing us from sharing an ES cluster with newer IDAs.

ECOM-3261 and SOL-295

Dockerize tests

Support bulk search in /search endpoint

Add an OEP-2 compliant openedx.yaml file

setting logging level to warning for ES.trace

Paginate API

Setting number_of_fragments to 0

[TNL-4029] user can't add more than maximum number of allowed notes

fix search when text and/or tags contain unicode data

TNL-4119