oeqa/runtime: Add debugging if networking fails

If networking fails, we can get useful informaiton over the serial connection. Add
this fallback code so that any issues can be more easily debugged by showing the
host and target networking states.

(From OE-Core rev: 3291f9d07ecfe7d3301dc914f5e6a80577cf1d5d)

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

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

@@ -7,7 +7,7 @@
 import time
 import signal
 
-from oeqa.runtime.case import OERuntimeTestCase
+from oeqa.runtime.case import OERuntimeTestCase, run_network_serialdebug
 from oeqa.core.decorator.depends import OETestDepends
 from oeqa.runtime.decorator.package import OEHasPackage
 
@@ -32,6 +32,7 @@ class SSHTest(OERuntimeTestCase):
               time.sleep(5)
               continue
           else:
+              run_network_serialdebug(self.target.runner)
               self.fail("uname failed with \"%s\" (exit code %s)" % (output, status))
         if status != 0:
             self.fail("ssh failed with \"%s\" (exit code %s)" % (output, status))