Phoenix-7672 Adding failover implementation via replay (Addendum)

[Himanshu-g81]

1. Updated the implementation of triggerFailover to call HAStore API (HAGroupStoreManager.getInstance(conf).setHAGroupStatusToSync(haGroupName))
2. Added support to handle 0 value of lastSyncTime from HA Store (as it's possible with new changes checked in). When it's 0, the first round is determined by taking the minimum across IN directories.
3. Added the test cases for both the above scenario.

[tkhurana]

It needs to be NeedsOwnMiniClusterTest.class

[tkhurana]

Actually, you need to move the ITs under src/it/java folder. It seems other tests have similar problems like ReplicationLogProcessorTest.java. So basically use the NeedsOwnMiniClusterTest.class and move to the IT folder. By convention IT classes end with IT keyword so you can rename these test classes too.