test_substituition: Fix failed test reporting to actually report failure.

You cannot put the "Testing <blah> pass/fail" on a single line before
actually performing the test.  Now any additional failure information is
logged before the test pass/fail announcement.

* Added an additional CDR(answer,u) test.
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Merged revisions 398018 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 398019 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 398023 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@398024 65c4cc65-6c06-0410-ace0-fbb531ad65f3