Fix paths for Network Admin Guide

Change-Id: I11846c1b41e613c1ab03582a894c3c74a99d44f6
fixing paths: openstack-image --> image-guide

Change-Id: Icd9fd384204f4b14327947e9d77d319afe240b57
correcting paths to high-availability-guide

Change-Id: Idc61f8a19e57231a77aecc6ccd5f1fa066e0d78c
Update Security Guide paths

Update path for security guide to follow rename

Change-Id: I494c5c0bf5ef932995a0304967eb533878257559
openstack-ha: Networking Highly Available

Active / Passive section:
New node: network-controller
* neutron-l3-agent
* neutron-dhcp-agent
* neutron-metadata-agent

Active / Active section:
*neutron-dhcp-agent: redirect to OpenStack Networking guide
*neutron-l3-agent and neutron-metadata-agent: redirect to Active / Passive
section since they are not HA.

implements blueprint improve-high-availability-support
Change-Id: Ie7e4f917f6c7cca05303275cd90e8415e323dfd2
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
Merge "correcting paths to high-availability-guide"
Merge "Fix paths for Network Admin Guide"
Merge "Update Security Guide paths"
Updated End User guide to include section to Create a Network

Included a procedure in the end user guide to create a network using the dashboard, as an end user.

Change-Id: I7f5929f27e429da547eea837fcf90269292e89d3
Merge "fixing paths: openstack-image --> image-guide"
Merge "Updated End User guide to include section to Create a Network"