set default color to black

Signed-off-by: Matt Bruce <matt.bruce@verizon.com>

MVMCoreUI/Atomic/Molecules/TopNotification/CollapsableNotificationTopView.swift

@@ -52,7 +52,7 @@ import Foundation
     open override func reset() {
         super.reset()
         label.setFontStyle(.BoldBodySmall)
-        label.textColor = .white
+        label.textColor = .black
         label.textAlignment = .center
     }