Fix GPG key for MongoDB 🤔

GPG error: http://repo.mongodb.com trusty/mongodb-enterprise/3.4
Release: The following signatures couldn't be verified because the
public key is not available: NO_PUBKEY BC711F9BA15703C6

But the official guide currently says to use another key
https://docs.mongodb.com/manual/tutorial/install-mongodb-enterprise-on-ubuntu/#import-the-public-key-used-by-the-package-management-system

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 \
  --recv 0C49F3730359A14518585931BC711F9BA15703C6

Author: exAspArk

mongodb/mongodb/templates/user-data.sh

@@ -6,7 +6,7 @@ hostname ${hostname}
 #
 # apt
 #
-DEBIAN_FRONTEND=noninteractive apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 0C49F3730359A14518585931BC711F9BA15703C6
+DEBIAN_FRONTEND=noninteractive apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv BC711F9BA15703C6
 echo "deb [ arch=amd64 ] http://repo.mongodb.com/apt/ubuntu trusty/mongodb-enterprise/3.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-enterprise.list
 DEBIAN_FRONTEND=noninteractive apt-key update -y
 DEBIAN_FRONTEND=noninteractive apt-get update -y