fix docs build on RHEL5/6

Change-Id: Id283e5044638116e5216edf15a07343fca96347c
remove obsolete README files

Change-Id: Iaaacbe763cf0cf5c459bef0d12111d6771170c63
ship new release notes in beaker-server package

Change-Id: I4b0e7ed5de2ed92a411f5042a44f83ab0c2d6c3e
Merge changes I4b0e7ed5,Iaaacbe76,Id283e504 into develop

* changes:
  ship new release notes in beaker-server package
  remove obsolete README files
  fix docs build on RHEL5/6