MaxSumForNonAdjacentElements doesnt give correct result if first element of array is negative

[saurabhyadav1985]

interview/blob/master/src/com/interview/dynamic/MaxSumForNonAdjacentElements.java

For input array { -2, 1, 3, -4, 5 }, result should be 8 but code returns result as 6.

In the dynamic programming code it should not compute excl to -2 at line # 28, excluded sum here should be 0.