Make ForkCDR e option not set end time of the newly forked CDR log

Make ForkCDR e option not set end time of the newly forked CDR log

Prior to this patch, ForkCDR's e option would immediately set the end time of the forked
CDR to that of the CDR that is being terminated. This resulted in the new CDR's end time
being roughly the same as it's beginning time (which is in turn roughly the same as the
original's end time).

(closes issue ASTERISK-19164)
Reported by: Steve Davies
Patches:
	cdr_fork_end.v10.patch uploaded by Steve Davies (license 5012)
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Merged revisions 362082 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 362084 from http://svn.asterisk.org/svn/asterisk/branches/10

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@362085 65c4cc65-6c06-0410-ace0-fbb531ad65f3