Merge pull request #515 from rhafer/release/pebbles/master

https://github.com/crowbar/barclamp-crowbar/pull/515

Merged by devtool for cloudsleuth
Log to /var/log/crowbar instead of /var/log
(cherry picked from commit b05906a326e27b71fd8f93ff4522e63614696a5a)

Signed-off-by: Ralf Haferkamp <rhafer@suse.de>