Minor fixes in format and documentation reference

The format url has been replaced by uri, following the recommendation in
https://swagger.io/docs/specification/data-models/data-types/

Change-Id: Ie7da543f7a3adda3a176768fbea485ed7d62b85b
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/osm-openapi.yaml b/osm-openapi.yaml
index eb3f7c6..c94612e 100644
--- a/osm-openapi.yaml
+++ b/osm-openapi.yaml
@@ -2,7 +2,7 @@
 
 servers:
   - description: OSM NB API
-    url: https://osm.etsi.org/nbapi/v1.0.0
+    url: 'https://osm.etsi.org/nbapi/v1.0.0'
 
 info:
   description: |
@@ -5602,7 +5602,7 @@
 
 externalDocs:
   description: Find out more about OSM
-  url: 'http://osm.etsi.org/wikipub'
+  url: 'https://osm.etsi.org/docs/user-guide/'
 
 components:
   responses:
@@ -7202,7 +7202,7 @@
           $ref: '#/components/schemas/VimType'
         vim_url:
           type: string
-          format: url     # uri?
+          format: uri
         vim_tenant_name:
           type: string
         vim_user:
@@ -7236,7 +7236,7 @@
           $ref: '#/components/schemas/VimType'
         vim_url:
           type: string
-          format: url     # uri?
+          format: uri
         vim_tenant_name:
           type: string
         vim_user:
@@ -7269,7 +7269,7 @@
           $ref: '#/components/schemas/VimType'
         vim_url:
           type: string
-          format: url     # uri?
+          format: uri
         vim_tenant_name:
           type: string
         vim_user:
@@ -7324,7 +7324,7 @@
           $ref: '#/components/schemas/WimType'
         wim_url:
           type: string
-          format: url     # uri?
+          format: uri
         user:
           type: string
         password:
@@ -7354,7 +7354,7 @@
           $ref: '#/components/schemas/WimType'
         wim_url:
           type: string
-          format: url     # uri?
+          format: uri
         user:
           type: string
         password:
@@ -7380,7 +7380,7 @@
           type: string
         wim_url:
           type: string
-          format: url     # uri?
+          format: uri
         user:
           type: string
         password:
@@ -7697,7 +7697,7 @@
           $ref: '#/components/schemas/K8sRepoType'
         url:
           type: string
-          format: url     # uri?
+          format: uri
     ArrayOfK8sRepoInfo:
       type: array
       items:
@@ -7713,7 +7713,7 @@
           $ref: '#/components/schemas/K8sRepoType'
         url:
           type: string
-          format: url     # uri?
+          format: uri
       required:
         - name
         - type