Update Buildroot to 2019.02.3 (#415)

* Update Buildroot to 2019-02.3

* Fix enter script

* Update ova_defconfig

* Fix network manager

* Remove runc patches

* Use same docker version

* Fix build

* Fix vmtools

* Fix depens

* Fix handling with tempfiles

* Fix permission handling

* Fix cp

* Cleanup

* Fix mounts

buildroot/support/testing/tests/package/sample_python_attrs.py

@@ -0,0 +1,15 @@
+import attr
+
+
+@attr.s
+class Obj(object):
+    x = attr.ib()
+    y = attr.ib(default=1)
+
+
+obj1 = Obj(2)
+assert(obj1.x == 2)
+assert(obj1.y == 1)
+obj2 = Obj(3, 4)
+assert(obj2.x == 3)
+assert(obj2.y == 4)