Bug 29593: Fix wrong tag in GET /public/libraries spec

This makes the documentation look untidy.

To test:
1. Open the api/v1/swagger/paths/libraries.json file with your favourite
   editor.
=> FAIL: All routes, but this one, have tags: ['library']
2. Apply this patch
=> SUCCESS: All routes have tags: ['libraries']
3. swagger.yaml too!
4. Sign off :-D

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>

api/v1/swagger/paths/libraries.json

@@ -4,7 +4,7 @@
       "x-mojo-to": "Libraries#list",
       "operationId": "listLibraries",
       "tags": [
-        "library"
+        "libraries"
       ],
       "summary": "List libraries",
       "parameters": [
@@ -188,7 +188,7 @@
       "x-mojo-to": "Libraries#add",
       "operationId": "addLibrary",
       "tags": [
-        "library"
+        "libraries"
       ],
       "summary": "Add library",
       "parameters": [
@@ -261,7 +261,7 @@
       "x-mojo-to": "Libraries#get",
       "operationId": "getLibrary",
       "tags": [
-        "library"
+        "libraries"
       ],
       "summary": "Get library",
       "parameters": [
@@ -299,7 +299,7 @@
       "x-mojo-to": "Libraries#update",
       "operationId": "updateLibrary",
       "tags": [
-        "library"
+        "libraries"
       ],
       "summary": "Update library",
       "parameters": [
@@ -376,7 +376,7 @@
       "x-mojo-to": "Libraries#delete",
       "operationId": "deleteLibrary",
       "tags": [
-        "library"
+        "libraries"
       ],
       "summary": "Delete library",
       "parameters": [
@@ -437,7 +437,7 @@
       "x-mojo-to": "Libraries#list",
       "operationId": "listLibrariesPublic",
       "tags": [
-        "library"
+        "libraries"
       ],
       "summary": "List libraries",
       "parameters": [

api/v1/swagger/swagger.yaml

@@ -140,7 +140,7 @@ tags:
     x-displayName: Items
     description: |
       Manage items
-  - name: "library"
+  - name: "libraries"
     x-displayName: Libraries
     description: |
       Manage libraries