[evlatests] Archive timestamp

[Vivek Dhawan]

the EVLA went back in time to 1958!

I suspect this was part of the "5hr" dataset taken the same day (going by the
MJD in the filename) which I got only 2.7hrs data.

C1310plus19.55123.771188541665 	public	C1310plus19	x	58-Nov-17 00:00:00 
58-Nov-17 00:00:00	4.89GB	EVLA:C:0	C	SDMset

While I'm thinking of it - it would be nice to have the default query
return a list in reverse time order - latest at the top.