Allow specification of admin user email in CLI installer

Move your config.php to a new location and open it for reference Run the CLI installer without options. This should put it into interactive mode Add all of the info from your previous config changing: DB prefix to t1_ dataroot to /tmp/t1 Do not specify the admin email address when asked After installation, log in Confirm that you are shown the admin profile editing page Remove the config.php Run the CLI installer again, changing: DB prefix to t2_ dataroot to /tmp/t2 Specify an invalid email address when asked (FYI, Moodle incorrectly regards addresses without an @ sign as invalid - try that) Confirm that the installation bailed Run the CLI installer again, changing: DB prefix to t2_ dataroot to /tmp/t2 Specify the admin email address when asked and provide a valid address After installation, log in View the admin profile Confirm that the specified e-mail address was set Remove the config.php Run the CLI installer again, specifying CLI all relevant arguments including an invalid adminemail and non-interactive Confirm that the installation bailed Run the CLI installer again, specifying CLI all relevant arguments including adminemail and non-interactive After installation, log in View the admin profile Confirm that the specified e-mail address was set