Add a way to build with mirrored p2 repositories

[lwrage]

Summary

The maven build relies on internet access to remote p2 repositories. Eclipse can create local copies ("mirrors") of the required repositories and maven can be configured to use these. This should speed up the dependency resolution phase of the build.

Required steps:

• Create ant project to mirror required copies
• Create mirrors and copy to osate-build.sei
• Configure maven settings
• Instructions

Environment

• OSATE Version: 2.6.1
• Operating System: all

[lwrage]

Documented at https://github.com/osate/osate2/wiki/Caching-Remote-p2-Repositories

[lwrage]

Fixed in
2a9e870
0b340e6
10f7395