Bump k8s version from 1.7.3 to 1.7.5.

* Bumped k8s image version from 1.7.3 to 1.7.5.

Change-Id: I367b1b75f9bc149af38a4b6810419045c3db3978
diff --git a/classes/cluster/virtual-mcp11-k8s-contrail/kubernetes/init.yml b/classes/cluster/virtual-mcp11-k8s-contrail/kubernetes/init.yml
index 2de4804..8268e6d 100644
--- a/classes/cluster/virtual-mcp11-k8s-contrail/kubernetes/init.yml
+++ b/classes/cluster/virtual-mcp11-k8s-contrail/kubernetes/init.yml
@@ -25,7 +25,7 @@
     kubernetes_calico_policy_image: calico/kube-policy-controller:v0.5.4
     kubernetes_opencontrail_cni_image: docker-prod-virtual.docker.mirantis.net/mirantis/kubernetes/contrail-integration/contrail-cni:v1.0.0
 
-    kubernetes_hyperkube_image: docker-prod-virtual.docker.mirantis.net/mirantis/kubernetes/hyperkube-amd64:v1.7.3-1
+    kubernetes_hyperkube_image: docker-prod-virtual.docker.mirantis.net/mirantis/kubernetes/hyperkube-amd64:v1.7.5-2
     kubernetes_virtlet_image: mirantis/virtlet:latest
     kubernetes_netchecker_agent_image: mirantis/k8s-netchecker-agent:v1.1.0
     kubernetes_netchecker_server_image: mirantis/k8s-netchecker-server:v1.1.0