chan_sip: Revert r398835 due to failing tests involving originate

(issue ASTERISK-22424)
Reported by: Jonathan Rose
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Merged revisions 398977 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 398986 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 398991 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@399006 f38db490-d61c-443f-a65b-d21fe96a405b