Github user dlyle65535 commented on the issue:
https://github.com/apache/incubator-metron/pull/193
@jaidrao - Kibana has added their own tile service with friendly ToS in
Kibana 4.5.3. This PR is intended to version lock the default version of Kibana
to 4.5.3 to make sure we stick with that version. There's nothing preventing
users from substituting the map server of their choice.
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