[ZEPPELIN-4783] Avoid warning on PUBKEY when apt update cran.rstudio #3755
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What is this PR for?
Solves https://issues.apache.org/jira/browse/ZEPPELIN-4783
What type of PR is it?
Bug Fix
What is the Jira issue?
https://issues.apache.org/jira/browse/ZEPPELIN-4783
How should this be tested?
Run the docker build and see no warning with the new Key.
Checks that from an inherited docker image we can now apt-get update without warnings and apt-get install succeed also, so the build of he inherited file is OK.
Questions: