workaround to convert enable_tunneling into a boolean

needed because str2bool cannot handle uppercase values
Merge pull request #69 from cwolferh/smoke_test

workaround to convert enable_tunneling into a boolean
BZ #1038281 - Do not disable selinux on openstack foreman installer.

https://bugzilla.redhat.com/show_bug.cgi?id=1038281
BZ #1038772 - Remove Tech Preview text

https://bugzilla.redhat.com/show_bug.cgi?id=1038772
Merge pull request #70 from jguiditta/bz1038281_selinux

Bz1038281 selinux
Removed obsolete README-Glusterfs.md
Add missing neutron_core_plugin param, sort params
Merge pull request #71 from jistr/neutron_core_plugin_param

Add missing neutron_core_plugin param, sort params
Separate nova/neutron host groups again

... but keep the underlying code DRY.

The reason behind separating them is to make the hostgroups accept
only those parameters that are then truly used.
Set neutron_metadata_proxy_shared_secret only when using neutron
Rename metadata_proxy_shared_secret to neutron_metadata_proxy_secret
Merge pull request #72 from jistr/wrapper_manifests2

Separate nova/neutron host groups again
Merge pull request #73 from jistr/param_rename

Param rename