Move OS-based fan tests to tests directory

Move test_fans_os.robot to /tests directory.

Change-Id: Iabfc771ccaa05d47df936ccdb9d595ffd8873788
Signed-off-by: Steven Sombar <ssombar@us.ibm.com>
diff --git a/systest/test_fans_os.robot b/tests/test_fans_os.robot
similarity index 100%
rename from systest/test_fans_os.robot
rename to tests/test_fans_os.robot