Add a test suite event to indicate when the atxfer 3-way feature is detected

This adds a test suite event that indicates to tests when the attended transfer
three-way call feature is detected.

Review: https://reviewboard.asterisk.org/r/2912/
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Merged revisions 401578 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@401580 f38db490-d61c-443f-a65b-d21fe96a405b
cdr_adaptive_odbc: Also apply a filter when the CDR value is empty.

Extra CDR records are written if a filtered CDR value is empty because the
filter is not checked.

(closes issue ASTERISK-22272)
Reported by: Jordi Llull Chavarria
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Merged revisions 401577 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 401579 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 401581 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@401582 f38db490-d61c-443f-a65b-d21fe96a405b