runtime/cases/connman.py: Stop using oeRuntimeTest

oeRuntimeTest class is not used anymore as part of runtime
migration, this particular case was missed, so fix it.

[YOCTO #10964]

(From OE-Core rev: d928e5166d8812e7e20bc95c0a8b5cb5439ec497)

Signed-off-by: Mariano Lopez <mariano.lopez@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/runtime/cases/connman.py

@@ -6,7 +6,7 @@ from oeqa.runtime.decorator.package import OEHasPackage
 class ConnmanTest(OERuntimeTestCase):
 
     def service_status(self, service):
-        if oeRuntimeTest.hasFeature("systemd"):
+        if 'systemd' in self.tc.td['DISTRO_FEATURES']:
             (_, output) = self.target.run('systemctl status -l %s' % service)
             return output
         else: