Merge branch 'admin-create-users' into 'develop'

user creation admin api will create multiple users

See merge request pleroma/pleroma!1170

diff --cc CHANGELOG.md
Simple merge

diff --cc lib/pleroma/user.ex
Simple merge

diff --cc lib/pleroma/web/admin_api/admin_api_controller.ex
Simple merge

diff --cc lib/pleroma/web/admin_api/views/account_view.ex
Simple merge

diff --cc lib/pleroma/web/router.ex
Simple merge

diff --cc test/web/admin_api/admin_api_controller_test.exs
Simple merge