[ZEPPELIN-1532] Remove map visualization from source tree, because of incompatible license #1501
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What is this PR for?
According to https://developers.arcgis.com/terms/ and and http://www.esri.com/legal/software-license, current map visualization depends on an online service that has incompatible restrictions to Apache 2 license. Please see #1210 (comment)
Possible alternative way is explained here.
I'm very sad to remove this very good contribution. So please anyone review the license and comment here if you have other opinions, or other way around.
What type of PR is it?
[Task]
Todos
What is the Jira issue?
https://issues.apache.org/jira/browse/ZEPPELIN-1532
Questions: