Python no longer prefers use of has_key method, use "in" instead

Python no longer prefers use of has_key method, use "in" instead

Fix sense of one test broken in first version.

Change-Id: I0374d68320fd4591c8f3e8632322682b5c573f39
Signed-off-by: Mats Wichmann <mats@linux.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/17839
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>