Two copies of launch.properties were getting assembled in the distribution zip.

  $ unzip -l carbon-kernel/distribution/target/wso2carbon-kernel-5.0.0-SNAPSHOT.zip  | grep 'launch.properties'
     1149  01-06-2014 05:59   wso2carbon-kernel-5.0.0-SNAPSHOT/repository/conf/osgi/launch.properties
     1149  01-06-2014 06:35   wso2carbon-kernel-5.0.0-SNAPSHOT/repository/conf/osgi/launch.properties
add wildcard **/*.properties exclusion for zip file
Merging pull request from Chris Snow whihc fixes the launch.properties file duplication issue with distribution. Merge branch 'launch-properties-fix' of https://github.com/snowch/carbon-kernel