adding nss to the Dockerfile

Author: shaneknapp

resource-managers/kubernetes/docker/src/main/dockerfiles/spark/Dockerfile

@@ -29,7 +29,7 @@ ARG spark_uid=185
 RUN set -ex && \
     apk upgrade --no-cache && \
     ln -s /lib /lib64 && \
-    apk add --no-cache bash tini libc6-compat linux-pam krb5 krb5-libs && \
+    apk add --no-cache bash tini libc6-compat linux-pam krb5 krb5-libs nss && \
     mkdir -p /opt/spark && \
     mkdir -p /opt/spark/examples && \
     mkdir -p /opt/spark/work-dir && \