Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.19.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.15...4.17.19

)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Remove master-slave metaphor

Follow the suggestions of [draft-knodel-terminology-00](https://tools.ietf.org/id/draft-knodel-terminology-00.html)
and other language frameworks and replace the notion of master/slave
with a more neutral primary/secondary.

* Configurable ProviderName

Co-authored-by: Tim van Dijen <tvdijen@gmail.com>

Closes #1346

Start testing admin-module

Fix ArtifactResolution due to misuse of Issuer

Convert to our wrapper class for assertions

Few small improvements

Check explicitly whether array element is defined

Check whether http://macedir.org/entity-category is set in the EntityAttributes
before using it as argument in in_array(). This prevents a "TypeError:
in_array() expects parameter 2 to be array, null given" error.

This situation happens when we do have EntityAttributes in the metadata but
none of type "http://macedir.org/entity-category". An example is an IdP
supporting https://refeds.org/category/research-and-scholarship, which would
have "http://macedir.org/entity-category-support" but not per se also
"http://macedir.org/entity-category".

We can remove several tags, login:processing and admin:metaconv_selectfile, and
replace several others with their English text.

It's easiest prevented by adding a linebreak after the <code> tag. This is not
ideal but a quick fix.

Fixes 336b7abe which changed the label from
'Login' to a single-use 'Log in' whilste the translations only have 'Login'.

* locales/de: Fix several wording, typo and grammar mistakes

* Fix typo

Co-authored-by: Tim van Dijen <tvdijen@gmail.com>