Add sysctl support in cloud config

tests/integration/assets/test_20/cloud-config.yml

@@ -0,0 +1,7 @@
+#cloud-config
+rancher:
+  sysctl:
+    kernel.domainname: test
+    dev.cdrom.debug: 1
+ssh_authorized_keys:
+  - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC85w9stZyiLQp/DkVO6fqwiShYcj1ClKdtCqgHtf+PLpJkFReSFu8y21y+ev09gsSMRRrjF7yt0pUHV6zncQhVeqsZtgc5WbELY2DOYUGmRn/CCvPbXovoBrQjSorqlBmpuPwsStYLr92Xn+VVsMNSUIegHY22DphGbDKG85vrKB8HxUxGIDxFBds/uE8FhSy+xsoyT/jUZDK6pgq2HnGl6D81ViIlKecpOpWlW3B+fea99ADNyZNVvDzbHE5pcI3VRw8u59WmpWOUgT6qacNVACl8GqpBvQk8sw7O/X9DSZHCKafeD9G5k+GYbAUz92fKWrx/lOXfUXPS3+c8dRIF

tests/integration/rostest/test_20_sysctl.py

@@ -0,0 +1,17 @@
+import pytest
+import rostest.util as u
+from rostest.util import SSH
+
+cloud_config_path = './tests/integration/assets/test_20/cloud-config.yml'
+
+
+@pytest.fixture(scope="module")
+def qemu(request):
+    q = u.run_qemu(request, run_args=['--cloud-config', cloud_config_path])
+    u.flush_out(q.stdout)
+    return q
+
+
+def test_sysctl(qemu):
+    SSH(qemu).check_call("sudo cat /proc/sys/kernel/domainname | grep test")
+    SSH(qemu).check_call("sudo cat /proc/sys/dev/cdrom/debug | grep 1")