fix(test): move ConditionallyStopTest init to beforeContext()

Genesis timestamp and node port must be set before Spring context
creation, otherwise DposSlot calculates negative slot values.

Author: vividctrlalt

framework/src/test/java/org/tron/core/services/stop/ConditionallyStopTest.java

@@ -54,11 +54,14 @@ public abstract class ConditionallyStopTest extends BaseMethodTest {
   private Map<String, String> witnesses;
 
   @Override
-  protected void afterInit() {
+  protected void beforeContext() {
     Args.getInstance().setNodeListenPort(10000 + port.incrementAndGet());
     Args.getInstance().genesisBlock.setTimestamp(Long.toString(time));
     initParameter(Args.getInstance());
+  }
 
+  @Override
+  protected void afterInit() {
     dposSlot = context.getBean(DposSlot.class);
     ConsensusService consensusService = context.getBean(ConsensusService.class);
     consensusService.start();