Update puppet-nova to the most recent stable/icehouse

Fixes: rhbz#1117035
Closes-Bug: 1338777

stackforge/puppet-nova@0b7b93f Fixes Facts string comparisons in CentOS 7
stackforge/puppet-nova@d682792 Release 4.1.0
stackforge/puppet-nova@f1155dd Pin gem versions for stable branch
stackforge/puppet-nova@b9ae517 Enable nova server to be run in SSL mode
stackforge/puppet-nova@1da5943 Default to utf8 for MySQL
stackforge/puppet-nova@3f0fb20 add rbd keyring name to secret.xml template
stackforge/puppet-nova@77fa1ce Allow configuring the rbd keyring name
stackforge/puppet-nova@9cb3885 Add API v3 endpoint support
stackforge/puppet-nova@109d482 Update puppetlabs-rabbitmq dependency

Signed-off-by: Gael Chamoulaud <gchamoul@redhat.com>