Resolved rubocop Naming/AccessorMethodName issue 403

Fixed Issue intel#403

Signed-off-by: Ong Yen Yee <[email protected]>
Signed-off-by: Ang Yee Teng <[email protected]>

Author: yenyeeong

lib/data_store.rb

@@ -668,7 +668,7 @@ def each
 
     def collection
       c = Collection.new(table, axes)
-      c.set_date create_time
+      c.date create_time
     end
 
     def delete
@@ -735,7 +735,7 @@ def unset(key, _value)
       self
     end
 
-    def set_date(date)
+    def date(date)
       @date = date
       self
     end