client: fix stderror logging in unit-test

When testing the file name and the line numbers are output to
stderr, this causes the test to fail when change moves the
lines.

Disable line numbers in the stderror log when testing, also
disable timestamps and colors. Make sure the log category
is print.

Change-Id: I7f1bd9454188f0ca869dada1fcc2877b789cc0ac
1 file changed