Replace number literals with variables

Author: sgdxbc

labs/lab4-shardedstore/tst/dslabs/shardkv/ShardStorePart1Test.java

@@ -79,7 +79,7 @@ public void test02JoinLeave() throws InterruptedException {
 
     runState.start(runSettings);
 
-    joinGroup(1, 3);
+    joinGroup(1, numServersPerGroup);
 
     Client client = runState.addClient(client(1));
     Map<String, String> kv = new HashMap<>();
@@ -131,7 +131,7 @@ public void test03ShardsMoveOnJoin() throws InterruptedException {
 
     runState.start(runSettings);
 
-    joinGroup(1, 3);
+    joinGroup(1, numServersPerGroup);
 
     Client client = runState.addClient(client(1));
     Map<String, String> kv = new HashMap<>();
@@ -182,7 +182,7 @@ public void test04ShardsMoveOnMove() throws InterruptedException {
 
     runState.start(runSettings);
 
-    joinGroup(1, 3);
+    joinGroup(1, numServersPerGroup);
 
     Client client = runState.addClient(client(1));
     Map<String, String> kv = new HashMap<>();