rosautotest breaks debug output in random places

Especially on the VMware test bots, test output often gets mixed with other debug output in unfavorable ways, e.g. inserting chunks of other debug prints in the middle of a test summary line. This breaks Testman's parsing and results in the wrong results being counted/displayed.

Rosautotest should make sure each DbgPrint/OutputDebugString call it makes ends in a newline if possible.