avocado.tests: Port bonnie from autotest

Add new 'bonnie' test based on autotest.
Signed-off-by: NAmador Pahim <apahim@redhat.com>

examples/tests/bonnie.py

+#!/usr/bin/env python
+
+import os
+
+from avocado import Test
+from avocado import main
+from avocado.utils import archive
+from avocado.utils import build
+from avocado.utils import process
+
+
+class Bonnie(Test):
+
+    """
+    Bonnie++ is a benchmark suite that is aimed at performing a number
+    of simple tests of hard drive and file system performance.
+    """
+
+    def setUp(self):
+        """
+        Build bonnie++
+        Source:
+         http://www.coker.com.au/bonnie++/experimental/bonnie++-1.96.tgz
+        """
+        bonnie_tarball = self.params.get('bonnie_tarball',
+                                         default='bonnie++-1.96.tgz')
+        tarball_path = self.get_data_path(bonnie_tarball)
+        archive.extract(tarball_path, self.srcdir)
+        bonnie_version = bonnie_tarball.split('.tgz')[0]
+        self.srcdir = os.path.join(self.srcdir, bonnie_version)
+        os.chdir(self.srcdir)
+        process.run('./configure')
+        build.make(self.srcdir)
+
+    def test(self):
+        """
+        Run 'bonnie' with its arguments
+        """
+        scratch_dir = self.params.get('scratch-dir', default=self.srcdir)
+        uid_to_use = self.params.get('uid-to-use', default=None)
+        number_to_stat = self.params.get('number-to-stat', default=2048)
+
+        args = []
+        args.append('-d %s' % scratch_dir)
+        args.append('-n %s' % number_to_stat)
+        if uid_to_use is not None:
+            args.append('-u %s' % uid_to_use)
+
+        cmd = ('%s/bonnie++ %s' % (self.srcdir, " ".join(args)))
+        process.run(cmd)
+
+
+if __name__ == "__main__":
+    main()

examples/tests/bonnie.py.data/bonnie.yaml

+# Bonnie options:
+# bonnie++ [-d scratch-dir] [-c concurrency] [-s size(MiB)[:chunk-size(b)]]
+#       [-n number-to-stat[:max-size[:min-size][:num-directories[:chunk-size]]]]
+#       [-m machine-name] [-r ram-size-in-MiB]
+#       [-x number-of-tests] [-u uid-to-use:gid-to-use] [-g gid-to-use]
+#       [-q] [-f] [-b] [-p processes | -y] [-z seed | -Z random-file]
+#       [-D]
+
+# Valid options in avocado test are bellow:
+setup:
+    scratch-dir: null
+    uid-to-use: null
+    number-to-stat: null