lib/oeqa/runtime: add tests for syslog and df

Add tests for free space and syslog.

Changed in v2:
    - limit df's output to /
    - syslog: fix restart in case of systemd

(From OE-Core rev: 1b39d57e7b5c9b69d565cf4d188ebc2f14e66ae6)

Signed-off-by: Alexandru Palalau <alexandru.palalau@intel.com>
Signed-off-by: Stefan Stanacar <stefanx.stanacar@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/runtime/df.py

@@ -0,0 +1,13 @@
+import unittest
+from oeqa.oetest import oeRuntimeTest
+from oeqa.utils.decorators import *
+
+def setUpModule():
+    skipModuleUnless(oeRuntimeTest.tc.target.run('which df')[0] == 0, "No df in image or no connection")
+
+class DfTest(oeRuntimeTest):
+
+    @skipUnlessPassed("test_ssh")
+    def test_df(self):
+        (status,output) = self.target.run("df / | sed -n '2p' | awk '{print $4}'")
+        self.assertTrue(int(output)>5120, msg="Not enough space on image. Current size is %s" % output)