Bug 18282: operationId must be unique

operationId has the following documentation:
 "Unique string used to identify the operation. The id MUST be unique among all
  operations described in the API."

This patch modifies operationIds to be unique accross our API operations.

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

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

api/v1/swagger/paths/cities.json

@@ -2,7 +2,7 @@
   "/cities": {
     "get": {
       "x-mojo-to": "Cities#list",
-      "operationId": "list",
+      "operationId": "listCities",
       "tags": ["cities"],
       "produces": [
         "application/json"
@@ -64,7 +64,7 @@
     },
     "post": {
       "x-mojo-to": "Cities#add",
-      "operationId": "add",
+      "operationId": "addCity",
       "tags": ["cities"],
       "parameters": [{
         "name": "body",
@@ -120,7 +120,7 @@
   "/cities/{cityid}": {
     "get": {
       "x-mojo-to": "Cities#get",
-      "operationId": "get",
+      "operationId": "getCity",
       "tags": ["cities"],
       "parameters": [{
         "$ref": "../parameters.json#/cityidPathParam"
@@ -157,7 +157,7 @@
     },
     "put": {
       "x-mojo-to": "Cities#update",
-      "operationId": "update",
+      "operationId": "updateCity",
       "tags": ["cities"],
       "parameters": [{
         "$ref": "../parameters.json#/cityidPathParam"
@@ -219,7 +219,7 @@
     },
     "delete": {
       "x-mojo-to": "Cities#delete",
-      "operationId": "delete",
+      "operationId": "deleteCity",
       "tags": ["cities"],
       "parameters": [{
         "$ref": "../parameters.json#/cityidPathParam"