testimage: Pass the logger into OERuntimeTestContextExecutor.getTarget()

I have no idea why we didn't do this but it means the code has nowhere
to log to unless we do this. This means we can then use the logger
to log data to the task logs.

(From OE-Core rev: e241fb128840889acff79dbf3fae7bfaafcb5357)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/testimage.bbclass

@@ -248,7 +248,7 @@ def testimage_main(d):
 
     # the robot dance
     target = OERuntimeTestContextExecutor.getTarget(
-        d.getVar("TEST_TARGET"), None, d.getVar("TEST_TARGET_IP"),
+        d.getVar("TEST_TARGET"), logger, d.getVar("TEST_TARGET_IP"),
         d.getVar("TEST_SERVER_IP"), **target_kwargs)
 
     # test context