add bash complition for kubectl to instances of ucp env

Related-prod: PRODX-00000
Change-Id: I6394d240030acd678ec079ed34200491a86113de
diff --git a/de/heat-templates/scripts/instance_boot.sh b/de/heat-templates/scripts/instance_boot.sh
index d052423..54e2d61 100644
--- a/de/heat-templates/scripts/instance_boot.sh
+++ b/de/heat-templates/scripts/instance_boot.sh
@@ -209,6 +209,10 @@
     curl --retry 6 --retry-delay 5 -LO https://storage.googleapis.com/kubernetes-release/release/${KUBECTL_VERSION}/bin/linux/amd64/kubectl
     chmod +x kubectl
     mv kubectl /usr/local/bin/
+cat << EOF >> ~/.bashrc
+source /usr/share/bash-completion/bash_completion
+source <(kubectl completion bash)
+EOF
 }
 
 function prepare_network {