fix: adding replicaset info to mongosh connection command. Adding mon…

…godb port variable (#145)

- Include the MongoDB port in the mongosh command (useful when running MongoDB in a different port)
- Include the replica set info in the mongosh command. It could be the case you aren't connected to a replica set primary but to a secondary one. If the replica set name is not specified, the mongosh command will fail since it is not possible to write to a secondary

drydock/templates/drydock/task/mongodb/init

@@ -1,5 +1,5 @@
 echo "Initialising MongoDB..."
-mongosh --host {{MONGODB_HOST }} {% if MONGODB_ROOT_USERNAME and MONGODB_ROOT_PASSWORD %} -u {{ MONGODB_ROOT_USERNAME }} -p {{ MONGODB_ROOT_PASSWORD }} {% endif %} admin <<EOF
+mongosh --host {% if MONGODB_REPLICA_SET %}{{ MONGODB_REPLICA_SET }}/{% endif %}{{ MONGODB_HOST }} --port {{ MONGODB_PORT }} {% if MONGODB_ROOT_USERNAME and MONGODB_ROOT_PASSWORD %}-u {{ MONGODB_ROOT_USERNAME }} -p {{ MONGODB_ROOT_PASSWORD }}{% endif %} admin <<EOF
   {% if MONGODB_USERNAME %}
   if (db.getUser("{{ MONGODB_USERNAME }}") == null) {
     db.createUser({