acu134221 suppress redundant rs_state output on Windows
acu134221 silence STDOUT instead of using NullLogger
Merge pull request #271 from rightscale/ivory_13_17_acu134221_windows_redundant_rs_state_output

Suppress redundant rs_state output on Windows. We are going with this for v5.9 release, but have a ticket to cleanup for 6.0