Add modify user role route

tests/Users/Modify user role.bru

@@ -0,0 +1,35 @@
+meta {
+  name: Modify user role
+  type: http
+  seq: 6
+}
+
+post {
+  url: http://localhost:8000/api/users/5/role
+  body: json
+  auth: inherit
+}
+
+headers {
+  Accept: application/json
+  X-XSRF-TOKEN: eyJpdiI6IkN0OWIwbGM5RU8yd2FzMmFURDRuNUE9PSIsInZhbHVlIjoiRjBtd0o5Um9jaFN4dDkzbGlGNFBEWlNDOEFUdGJQVzgrSmpabTlQMDZUekhnY3NnWG55RUQwUDdKazBlRk1pWTloUGRKQjhNRE5oVCtLT2dLSmY1d2RRSEFuNjZ3UDNWVURLNERBckd1TnMwM2ZOZ2xzM2dlQjFwYlZIemZmRGEiLCJtYWMiOiI4ZGVkNTY3NjIwMjU3YmZiOWRjZDE1NDQ1OGU3ZTkwYzFlYTMzYmEwNDdhNWMwNWQxNWUyMTBjODMyMTY5ZGRlIiwidGFnIjoiIn0=
+}
+
+body:json {
+  {
+    "role": {{role}}
+  }
+}
+
+vars:pre-request {
+  role: 2
+}
+
+assert {
+  res.status: eq 200
+}
+
+settings {
+  encodeUrl: true
+  timeout: 0
+}