TEST_FRAMEWORK: Fix threewaytransfer reporting

Ensure that three-way transfers can be reported even if featuremap is
non-NULL.
........

Merged revisions 418810 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@418811 f38db490-d61c-443f-a65b-d21fe96a405b