hotfix to support version 13

Author: dustinvanbuskirk

Dockerfile

@@ -15,14 +15,15 @@ RUN apk add --update bash
 #copy all versions of kubectl to switch between them later.
 COPY --from=builder kubectl1.15 /usr/local/bin/
 COPY --from=builder kubectl1.14 /usr/local/bin/
+COPY --from=builder kubectl1.13 /usr/local/bin/
 COPY --from=builder kubectl1.12 /usr/local/bin/
 COPY --from=builder kubectl1.10 /usr/local/bin/
 COPY --from=builder kubectl1.6 /usr/local/bin/
 
 # Set Default
 COPY --from=builder kubectl1.14 /usr/local/bin/kubectl
 
-RUN chmod +x /usr/local/bin/kubectl /usr/local/bin/kubectl1.6 /usr/local/bin/kubectl1.10 /usr/local/bin/kubectl1.12 /usr/local/bin/kubectl1.14 /usr/local/bin/kubectl1.15
+RUN chmod +x /usr/local/bin/kubectl /usr/local/bin/kubectl1.6 /usr/local/bin/kubectl1.10 /usr/local/bin/kubectl1.12 /usr/local/bin/kubectl1.13 /usr/local/bin/kubectl1.14 /usr/local/bin/kubectl1.15
 
 WORKDIR /
 

cf-deploy-kubernetes.sh

@@ -73,8 +73,10 @@ fi
 # Determine appropriate kubectl version
 if [[ "${SERVER_VERSION}" -eq "15" ]]; then
     KUBE_CTL="15"
-elif [[ "${SERVER_VERSION}" -le "14" && "${SERVER_VERSION}" -ge "13" ]]; then
+elif [[ "${SERVER_VERSION}" -eq "14" ]]; then
     KUBE_CTL="14"
+elif [[ "${SERVER_VERSION}" -eq "13" ]]; then
+    KUBE_CTL="13"
 elif [[ "${SERVER_VERSION}" -le "12" && "${SERVER_VERSION}" -ge "11" ]]; then
     KUBE_CTL="12"
 elif [[ "${SERVER_VERSION}" -le "10" && "${SERVER_VERSION}" -ge "9" ]]; then