test_cel: Fix unit tests broken due to event def changes from res_corosync

This patch instructs test_cel to skip any IE types it doesn't care about. The
addition of the raw and bitfield types caused the tests to fail.


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/12@414528 f38db490-d61c-443f-a65b-d21fe96a405b