Add support for neutron nvp plugin

This patch adds support for NVP plugin configuration.

implement blueprint nvp-plugin-support
Change-Id: I8aff4fc6895ed5a3342e2e93d306014ec0982af8
(cherry picked from commit 25abac3c93442898203a42526cb4fb3d41fa140d)
ensure linuxbridge dependency is installed on RHEL

Package['neutron-plugin-linuxbridge'] is defined in
plugins/linuxbridge.pp but is missing in agents/linuxbridge.pp.

If agents::linuxbridge is used directly, the package is not defined.
This changes fixes the situation on RHEL.

The problem has already been fixed for OVS in
changeset Iedf8a607915f65b7a8cf7af99749b9b65cba7bd9

Change-Id: Ic4e15825e4f2d1f2ce2c34d2fdb01c8f6b19d491
(cherry picked from commit
9bb97fd444f28f797fc500331e9c52b660680e07)
Allow log_dir to be set to false in order to disable file logging

This commit allows a user to disable logging to a directory (for
example if syslog is enabled) in order not to login twice.

Conflicts: spec/classes/neutron_server_spec.rb

(cherry picked from commit 2efcff08d3aac7dcca9a6e1fa228a63db36de06e)
Change-Id: I0d201b8892cdaea86714b39f7716e763a40a2adc
Closes-bug: #1282296
Merge "Allow log_dir to be set to false in order to disable file logging" into stable/havana
Merge "ensure linuxbridge dependency is installed on RHEL" into stable/havana
Prefix database parameters with database

Be consistent with other puppet modules for OpenStack by prefixing
database related parameters with database.

Properly deprecate sql_* parameters and other database parameters.

Conflicts:
	spec/classes/neutron_server_spec.rb

Closes-bug: #1273771
Change-Id: I6c5fa5426162e2dd358a360324abb040c7462f16
(cherry picked from commit a6232366a2d538447a6568ec61ddbe9fcbdecad6)
Merge "Add support for neutron nvp plugin" into stable/havana
Merge "Prefix database parameters with database" into stable/havana
Merge branch 'stable/havana' of https://github.com/stackforge/puppet-neutron into havana