Fix log file name for unit test.

  - This test was only succeeding for us because most of us are 
  developing on Windows or Mac OS X, and both have case-insensitive 
  file systems by default!

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597656 13f79535-47bb-0310-9956-ffa450edef68
Delete JSONCompleteFileAppenderTest.xml.

  - Will re-add with proper file name casing.


git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597657 13f79535-47bb-0310-9956-ffa450edef68
Re-add JsonCompleteFileAppenderTest.xml.


git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597658 13f79535-47bb-0310-9956-ffa450edef68