FreeSWITCH-FS-6836

Merge pull request #440 in FS/freeswitch from ~JMESQUITA/freeswitch:bugfix/FS-7979-conference-transfer-doesn-t-prompt to master

* commit '1d3e85093093986d8aabc1caa109b63078d82750':
  FS-7979: [verto_communicator] Removing extra console.log and commented line.
  FS-7979: [verto_communicator] Prompt for extension before transferring a conference member.