[cjohnston,r=billy-olsen] Fix the markdown specifications in the README

file. Change categories to tags in metadata.yaml, fix typos in config.yaml.

Closes-Bug: 1495679

README.md

@@ -1,8 +1,6 @@
-=====================
-nova-cloud-controller
-=====================
+# nova-cloud-controller
 
-Cloud controller node for Openstack nova. Contains nova-schedule, nova-api, nova-network and nova-objectstore.
+Cloud controller node for OpenStack nova. Contains nova-schedule, nova-api, nova-network and nova-objectstore.
 
 The neutron-api interface can be used join this charm with an external neutron-api server. If this is done
 then this charm will shutdown its neutron-api service and the external charm will be registered as the
@@ -14,18 +12,14 @@ to the nova-cloud-controller. If running in HA mode then the public vip is used
 to local. Note: The console access protocol is baked into a guest when it is created, if you change it then
 console access for existing guests will stop working
 
-******************************************************
-Special considerations to be deployed using Postgresql
-******************************************************
+**Special considerations to be deployed using Postgresql**
 
-juju deploy nova-cloud-controller
-juju deploy postgresql
+    juju deploy nova-cloud-controller
+    juju deploy postgresql
+    juju add-relation "nova-cloud-controller:pgsql-nova-db" "postgresql:db"
+    juju add-relation "nova-cloud-controller:pgsql-neutron-db" "postgresql:db"
 
-juju add-relation "nova-cloud-controller:pgsql-nova-db" "postgresql:db"
-juju add-relation "nova-cloud-controller:pgsql-neutron-db" "postgresql:db"
-
-Deploying from source
-=====================
+## Deploying from source
 
 The minimum openstack-origin-git config required to deploy from source is:
 
@@ -43,7 +37,7 @@ The minimum openstack-origin-git config required to deploy from source is:
 Note that there are only two 'name' values the charm knows about: 'requirements'
 and 'nova'. These repositories must correspond to these 'name' values.
 Additionally, the requirements repository must be specified first and the
-nova repository must be specified last. All other repostories are installed
+nova repository must be specified last. All other repositories are installed
 in the order in which they are specified.
 
 The following is a full list of current tip repos (may not be up-to-date):

config.yaml

@@ -200,7 +200,7 @@ options:
     description: |
       SSL certificate to install and use for API ports.  Setting this value
       and ssl_key will enable reverse proxying, point Nova's entry in the
-      Keystone catalog to use https, and override any certficiate and key
+      Keystone catalog to use https, and override any certificate and key
       issued by Keystone (if it is configured to do so).
   ssl_key:
     type: string

metadata.yaml

@@ -4,7 +4,7 @@ summary: "Openstack nova controller node."
 description: |
   Cloud controller node for Openstack nova.  Contains nova-schedule,
   nova-api, nova-network and nova-objectstore.
-categories:
+tags:
   - openstack
 provides:
   nrpe-external-master: