make test: improve documentation and PEP8 compliance

Change-Id: Ib4f0353aab6112fcc3c3d8f0bcbed5bc4b567b9b
Signed-off-by: Klement Sekera <ksekera@cisco.com>

test/template_bd.py

@@ -75,8 +75,8 @@ class BridgeDomain(object):
 
         self.pg_start()
 
-        # Pick first received frame and check if it's the
-        # non-encapsulated frame
+        # Pick first received frame and check if it's the non-encapsulated
+        # frame
         out = self.pg1.get_capture(1)
         pkt = out[0]
         self.assert_eq_pkts(pkt, self.frame_request)