If a person sends out emails with their name using 'Last, First'
notation, then when we compose email_name() it looks like:

'Last, First <address@email.tld>'

When test results are sent out, the above gets appended directly to the
recipient fields, resulting in emails being sent to 'Last@localhost' and
'First <address@email.tld>'.

Let's fix that by always putting the name in the quotes, just like that:

'"Last, First" <address@email.tld>'

Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>