Updated puppet-neutron to latest stable/icehouse

stackforge/puppet-neutron@0a7e0f1 Add plugin config file to /etc/default/neutron-server
stackforge/puppet-neutron@f06bb9b Install neutron-plugin-ml2 package on Ubuntu
stackforge/puppet-neutron@83b0656 Support for Cisco ML2 Mech Driver
stackforge/puppet-neutron@7abb13a Rename QUOTAS section for quotas
stackforge/puppet-neutron@ebad7a3 Add ability to configure dhcp_agent_notification
stackforge/puppet-neutron@a028071 Add linuxbridge mechanism support for ML2 plugin
stackforge/puppet-neutron@fcb68dd ml2: fix neutron-server restart
stackforge/puppet-neutron@cf68d42 Undeprecate enable_security_group parameter
stackforge/puppet-neutron@06d3c52 Simplify ml2_config.ini symlink resource management
stackforge/puppet-neutron@6f106f1 Release 4.2.0