installation: cerberus package upgrade

* Upgrades Cerberus package in order to support some new features.

Signed-off-by: Konstantinos Kostis <konstantinos.kostis@cern.ch>
restful: fix for testing accesstoken

* Renames class RestValidator to RESTValidator.

Signed-off-by: Konstantinos Kostis <konstantinos.kostis@cern.ch>
tags: fix for editor in search results

* Fixes broken javascript editor.  (addresses #1792)

Signed-off-by: Eirini Psallida <eirini.psallida@cern.ch>
linkbacks: fix external url creation

* Fixes the order of keywords arguments in `url_for` that breaks if one
  tries to generate external link.  (closes #1707)

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
travis: removal of Python 2.6

* Removing python 2.6 from the test matrix as it times out.

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>
linkbacks: fix external url creation

* Amends 4755a50867bd34a8debb4b87d952e72b931eefbc.  (addresses #1707)

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
docs: typos and fixes

Signed-off-by: Ivan Masár <helix84@centrum.sk>
workflows: hotfix unittest

* Improves tests stability.

* Simplifies workflow engine.

* Fixes the endlessy working workflow engine bug.

* Reduces log produces by workflows unit tests.

* Inverts arguments in test to expected val, current val.

Signed-off-by: Guillaume Lastecoueres <guillaume.lastecoueres@cern.ch>
Co-authored-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
Reported-by: Yoan Blanc <yoan.blanc@cern.ch>
Tested-by: Yoan Blanc <yoan.blanc@cern.ch>
installation: Flask-Registry version update

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
installation: Flask-Collect from PyPI

* Removing the custom version.

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>
records: no JSON version cached check fix

Signed-off-by: Esteban J. G. Gabancho <esteban.gabancho@gmail.com>
travis: config simplification

* Installs the npm dependencies globally, less configuration.

* Forces non interactive versions of apt-get and make-ssl-cert.

* Fixes uglifyjs to uglify-js, different projects.

* Ignores stuff from bower.io.

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>
global: jellyfish to replace editdist

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>
general: legacy directory pre-creation

* Ensures legacy directories are pre-created upon legacy extension
  `setup_app()` call.  (closes #1789)

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
Reviewed-by: Yoan Blanc <yoan.blanc@cern.ch>
Reviewed-by: Jiri Kuncar <jiri.kuncar@cern.ch>