Timing info in reports is incorrect

[sullo]

Time related data in reports can often be incorrect.

• elapsedtime in xml report is blank
• any report generated after a control-c has missing or incomplete data
• There is a scope issue (it seeems from a quick look) with the availability of some of this info from %mark to the reporting functions.
• In the case of canceled scans, a method should be called before writing reports to populate the otherwise missing end timestamps.

[sullo]

<niktoscan hoststest="0" options="-h cirt.net -o test.xml" version="2.2.0" scanstart="Sat Apr 29 20:52:31 2017" scanend="Wed Dec 31 19:00:00 1969" scanelapsed=" seconds" nxmlversion="1.2">