Add the following items for doc/source/contributor 1. add file for documentation, gerrit, jenkins, launchpad and releasenotes 2. Add README for admin, cli, install and contributor Change-Id: I6463a9e4df64a2e2e3cb0043f9e5aaa92aeb0519
Change-Id: Ieb3bfbdcfdfb411ad549194fae1aba32434df5f0 Partial-Bug: #1703442