Allow upper-case letters in Pulse usernames.
Allow upper-case letters in Pulse usernames.

yaoweizhen/pulseguardian,mozilla/pulseguardian,yaoweizhen/pulseguardian,markrcote/pulseguardian,mccricardo/pulseguardian,mccricardo/pulseguardian,mozilla/pulseguardian,markrcote/pulseguardian,mccricardo/pulseguardian,yaoweizhen/pulseguardian,mccricardo/pulseguardian,yaoweizhen/pulseguardian,mozilla/pulseguardian,mozilla/pulseguardian,markrcote/pulseguardian,markrcote/pulseguardian