Tests: cts: Add non-XML tests to cts-attrd.

The bug introduced by 8d12f32efa06878778c86045fb01ee2d0bbe05ab was not
caught by cts-attrd because it only occurred in text output mode, and
cts-attrd only uses XML output mode. This tests duplicates various
existing queries in text mode. While it's unlikely we will have that
exact problem again in the future, it seems like a good idea to test the
text output code as well.