#1299 trimProperties mishandled metadata

[Jeremy Faden]

I noticed one of the test vaps would work, but the flash to indicate selection didn't work, and tracked it down to where trimProperties(ds,startIndex,stopIndex) assumed that the input to getDimensionProperties was a mutable HashMap, when the result should have been used:
vap+cdaweb:ds=C3_PP_CIS&id=V_p_xyz_gse__C3_PP_CIS&timerange=2005-09-11+8:37+to+14:22

What I don't understand is why this bug had little effect on the rest of the system. I've corrected the bug, but this still needs to be studied.