Updated test file for unit test

- added race size represented the number of teams who would compete in a race
- changed teams to an array containing maps of each team within team name and boat velocity

#test #story[8] #story[6]

src/test/java/seng302/valid.json

@@ -1,5 +1,13 @@
 {
-  "time-scale": 100,
+  "race-name": "AC35",
-  "race-name": "IDK",
+  "time-scale": 1,
-  "teams":["team1","team2","team3"]
+  "race-size": 2,
+  "teams": [
+    {"team-name": "Oracle Team USA", "velocity": 20.9},
+    {"team-name": "Artemis Racing", "velocity": 18.3},
+    {"team-name": "Emirates Team New Zealand", "velocity": 21.5},
+    {"team-name": "Groupama Team France","velocity": 19.9},
+    {"team-name": "Land Rover BAR", "velocity": 17.6},
+    {"team-name": "SoftBank Team Japan", "velocity": 16.6}
+  ]
 }