Fixing all tests

Author: aliabbasrizvi

core-api/src/main/java/com/optimizely/ab/event/internal/payload/Snapshot.java

@@ -70,7 +70,9 @@ public boolean equals(Object o) {
         if (activationTimestamp != null ?
                 !activationTimestamp.equals(snapshot.activationTimestamp) :
                 snapshot.activationTimestamp != null) return false;
-        if (!decisions.equals(snapshot.decisions)) return false;
+        if (decisions != null ?
+               !decisions.equals(snapshot.decisions) :
+               snapshot.decisions != null) return false;
         return events.equals(snapshot.events);
     }