MDL-44139 admin: standardise warning renderer use

Take three handcoded warnings and convert them to calling
the 'warning' renderer like rest of the file.

Then remove redundant CSS and/or move specific CSS to generic
places so it's shared.
MDL-41175 mod_imscp: unified @package use
MDL-41176 mod_label: unified @package use
MDL-41177 mod_lesson: unified @package use
MDL-41178 mod_lti: unified @package use
MDL-44168 html: border=1 on regexdetect table
MDL-44159 mod_wiki: unify @package use
MDL-44111 behat: Limiting dump files filename size
MDL-44108 behat: Adding a roles data generator
MDL-43837 behat: Adding reduced timeouts

There are steps where we want to check that
"something" does not appear in the page
or does not exist. We still have to spin
but we don't need to spin for 6 seconds.
Merge branch '41178-27' of git://github.com/samhemelryk/moodle
Merge branch '41177-27' of git://github.com/samhemelryk/moodle
Merge branch '41176-27' of git://github.com/samhemelryk/moodle
Merge branch '41175-27' of git://github.com/samhemelryk/moodle
Merge branch 'wip-MDL-44168-master' of git://github.com/ds125v/moodle

Conflicts:
	theme/bootstrapbase/style/moodle.css
Merge branch '44159-27' of git://github.com/samhemelryk/moodle
Merge branch 'wip-MDL-44139-master' of git://github.com/ds125v/moodle

Conflicts:
	theme/bootstrapbase/style/moodle.css
Merge branch 'MDL-44111_master' of git://github.com/dmonllao/moodle
Merge branch 'MDL-44108_master' of git://github.com/dmonllao/moodle
MDL-44101 Javascript: Introduce a module to focus after widget close

This module supports focusing on a specified Node, or attempting to
determine the Node which caused the displayed the Widget to return focus to
that location.