Virgo Spring-Cleaning - Tidy up Gradle build

This commit is part of the Virgo Spring-Cleaning 2019 to focus on the
main deliverables of Eclipse Virgo.

* Remove build flags 'local.build'/'include.docs' - both flags aren't
used by any Jenkins jobs.
* Remove unused scripts in 'packaging/nano/bin'
* Remove unused parameter in VirgoToolsPlugin
23 files changed