Always start heat-engine service

Do not rely on the notifications to have it started.

https://bugzilla.novell.com/show_bug.cgi?id=859678
Simplify some code that was copied & pasted

The node using the server.rb recipe always has a heat-server role. This
code came from a copy from ceilometer.
Merge pull request #30 from vuntz/bnc859678

Always start heat-engine service
Merge pull request #31 from vuntz/copy-paste

Simplify some code that was copied & pasted
Move lock_path to /var/run

/var/lock is blacklisted on openSUSE
Merge pull request #32 from dirkmueller/release/roxy/master

Move lock_path to /var/run
Do not refer to Heat as OpenStack Orchestration

http://lists.openstack.org/pipermail/openstack-dev/2014-February/026323.html
Merge pull request #34 from vuntz/naming

Do not refer to Heat as OpenStack Orchestration
Fix typo

Apparently unused, otherwise it would have never worked
Merge pull request #37 from dirkmueller/release/roxy/master

Fix typo