Augeas improvements:

* Added ability to specify initial content for a file that doesn't
  exist, to avoid a messy situation where you'd have to probe for file
  existence and either use a Path type="file" or Path type="augeas"
  depending, and run Bcfg2 twice.
* All commands in an Augeas path are run if *any* of them fail to
  verify.  Previously, only commands that hadn't been run would be
  installed, but that had issues, particularly with the Clear command,
  which could pass verification but then be required during the
  installation phase anyway.
* Miscellaneous bug fixes.
misc/bcfg2.spec: Use systemd scripts on RHEL7

Signed-off-by: Sol Jerome <sol.jerome@gmail.com>