[Debugging] fix test: "testGetLatestBlockExtensively"

[bbulgu]

org.opentest4j.AssertionFailedError: latest block wrong ==> Expected :000011111011011110110111111100838048897 Actual :000000000000000000000000000000838048897

The ending is the same but the starting part is different.

The first iteration runs fine, however, in the second iteration we get the error.

The error doesn't arise if we change the bottom if clause to if (i % 2 == 1) {

I think this might be because the insertBlock method works only if the prevAddress is different from the node's address and if the if clause remains as i%2==0, then the insertBlock doesn't work since prevAddress is equal to address in that case.