Bug 37809: Add more embed options to checkouts endpoints

This patch adds more embed options to checkouts endpoints.
To test you really need to try them on a REST tool.

* patron
* item
* library

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

api/v1/swagger/paths/checkouts.yaml

@@ -29,6 +29,9 @@
           type: string
           enum:
             - issuer
+            - item
+            - library
+            - patron
             - renewals
         collectionFormat: csv
     produces:
@@ -148,6 +151,9 @@
           type: string
           enum:
             - issuer
+            - item
+            - library
+            - patron
             - renewals
         collectionFormat: csv
     produces:

api/v1/swagger/paths/patrons_checkouts.yaml

@@ -24,6 +24,11 @@
           type: string
           enum:
             - cancellation_requested
+            - issuer
+            - item
+            - library
+            - patron
+            - renewals
         collectionFormat: csv
     produces:
       - application/json