minor changes in tests

tests/scenarios/solutions_completed_my.json

@@ -2,7 +2,7 @@
   "name": "'My solutions' page is up",
   "description": "Checks if my solutions retuns empty object",
   "method": "GET",
-  "url": "http://localhost:8080/api/v1/solutions/my",
+  "url": "http://localhost:8080/api/v1/solutions/completed",
   "user": {
             "login": "rosiu1",
             "password": "rosiu321"

tests/scenarios/submit_flag.json

@@ -7,5 +7,5 @@
             "login":"rosiu1",
             "password":"rosiu321"
           },
-  "payload": "459fffa9c2211f96df77c7d8ff72f2b7"
+  "payload": "AGH_sdfg1f1"
 }