It was a moment for which Dan Farrer hadn’t prepared himself.   In the days leading up to finding his birth mother, the 53-year-old Buckeye resident didn’t expect to feel the wave of emotions that would overcome him while knocking on her door last fall.  “The second we walked up to that door, I think both of us had tears,” recalled his niece, 36-year-old Kayli DeBernardi of Tolleson. “It was just so emotional, so beautiful and probably a moment that I’ll remember for the rest of