Fix 1539: Helm v2.17.0 and set default value for stablerepourl

The --skip-repo option was not available. The version v2.17.0 is the
latest v2 version available.

Set https://charts.helm.sh/stable as the default stablerepourl value.

Change-Id: Ifdd85f0f891a705f56cdd50c6e4dbf95820d706f
Signed-off-by: David Garcia <david.garcia@canonical.com>
(cherry picked from commit 1d5c221862067b3b5b6e0555dcc4eb6c34e9a9f9)
diff --git a/docker/LCM/Dockerfile b/docker/LCM/Dockerfile
index 8215fd9..81524a9 100644
--- a/docker/LCM/Dockerfile
+++ b/docker/LCM/Dockerfile
@@ -36,8 +36,8 @@
     && echo "deb https://apt.kubernetes.io/ kubernetes-xenial main" | tee -a /etc/apt/sources.list.d/kubernetes.list \
     && apt-get update && apt-get install -y kubectl=1.20.4-00
 
-RUN curl https://get.helm.sh/helm-v2.15.2-linux-amd64.tar.gz --output helm-v2.15.2.tar.gz \
-    && tar -zxvf helm-v2.15.2.tar.gz \
+RUN curl https://get.helm.sh/helm-v2.17.0-linux-amd64.tar.gz --output helm-v2.17.0.tar.gz \
+    && tar -zxvf helm-v2.17.0.tar.gz \
     && mv linux-amd64/helm /usr/local/bin/helm \
     && rm -r linux-amd64/
 
@@ -127,6 +127,9 @@
 ENV OSMLCM_VCA_KUBECTLPATH /usr/bin/kubectl
 ENV OSMLCM_VCA_JUJUPATH    /usr/local/bin/juju
 
+# helm
+ENV OSMLCM_VCA_STABLEREPOURL https://charts.helm.sh/stable
+
 # logs
 # ENV OSMLCM_GLOBAL_LOGFILE  /app/log/lcm.log
 # ENV OSMLCM_GLOBAL_LOGLEVEL DEBUG