MDL-45079 badges: Remove user email address from badge page

Signed-off-by: Yuliya Bozhko <yuliya.bozhko@totaralms.com>
MDL-45266 behat: tests for login block
MDL-45156 behat: Changing html_writer::empty_tag for start_tag

Credits to Daniele Cordella.
Merge branch 'MDL-45079_25' of https://github.com/totara/openbadges into MOODLE_25_STABLE
MDL-45287 fix behat database reset between scenarios

We cannot find out if DB received any writes because behat
web access runs in different request.

This was affecting only scenarios without generators.
Merge branch 'MDL-45156_25' of git://github.com/dmonllao/moodle into MOODLE_25_STABLE
Merge branch 'MDL-45266-25' of git://github.com/danpoltawski/moodle into MOODLE_25_STABLE
Merge branch 'w18_MDL-45287_m25_dbreset' of git://github.com/skodak/moodle into MOODLE_25_STABLE