Bug 876754 - Use comma instead of | separator in contact auto suggestion - r=gnarf

Closes gh-10111
(cherry picked from commit 86d7da26f2a4468e46686006d5f09b09c6175db9)
Fix Tests From Bug 876754 - 86d7da2 a=npotb
(cherry picked from commit 26b9f19d10c0009c2fc1c950fa3341dfa9e9235c)