Followup to r1598483:

1. svn:eol-style
2. Add *.json to text.files patternset in build.xml
3. Add json file to rat-excludes.txt
Per RFC7159 I see no way to add license comment to a JSON file. It is a data file.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1598763 13f79535-47bb-0310-9956-ffa450edef68