ScrollView - Second part of overshoot fix, overshoot will now only animate if pre...

ScrollView - Second part of overshoot fix, overshoot will now only animate if pre scroll and post scroll values are different, preventing updating when not needed and saving power

[problem]      If wrapping is on, the overshoot animation would still be animated for 0.35s
[cause]        Values used to compare were at opposite ends of scroll view due to wrapping
[solution]     Wrap the correct value back round so in wrapping mode they were both the same, in this case Snapping overshoot is avoided

Change-Id: I4d85cc5cb814a4cdc48c3edca66a7d4e6bc945ad
Signed-off-by: Julien Heanley <j.heanley@partner.samsung.com>
Signed-off-by: Adeel Kazmi <adeel.kazmi@samsung.com>