Client go upgrade v6 (#352)

There are shortcuts in this code, i.e. we created the deepcopy function
by using the deepcopy package instead of the generated code, that will
be addressed once migrated to client-go v8. Also, some objects,
particularly statefulsets, are still taken from v1beta, this will also
be addressed in further commits once the changes are stabilized.

glide.yaml

@@ -10,38 +10,14 @@ import:
   - service/ec2
 - package: github.com/lib/pq
 - package: github.com/motomux/pretty
-- package: k8s.io/apiextensions-apiserver
-  subpackages:
-  - pkg/client/clientset/clientset
 - package: k8s.io/apimachinery
-  version: release-1.7
-  subpackages:
-  - pkg/api/errors
-  - pkg/api/resource
-  - pkg/apis/meta/v1
-  - pkg/labels
-  - pkg/runtime
-  - pkg/runtime/schema
-  - pkg/runtime/serializer
-  - pkg/types
-  - pkg/util/intstr
-  - pkg/util/remotecommand
-  - pkg/watch
+  version: kubernetes-1.9.9
+- package: k8s.io/apiextensions-apiserver
+  version: kubernetes-1.9.9
 - package: k8s.io/client-go
-  version: ^4.0.0
-  subpackages:
-  - kubernetes
-  - kubernetes/scheme
-  - kubernetes/typed/apps/v1beta1
-  - kubernetes/typed/core/v1
-  - kubernetes/typed/extensions/v1beta1
-  - pkg/api
-  - pkg/api/v1
-  - pkg/apis/apps/v1beta1
-  - pkg/apis/extensions/v1beta1
-  - rest
-  - tools/cache
-  - tools/clientcmd
-  - tools/remotecommand
+  version: ^6.0.0
+- package: k8s.io/code-generator
+  version: kubernetes-1.9.9
+- package: k8s.io/gengo
 - package: gopkg.in/yaml.v2
 - package: github.com/mohae/deepcopy