moved a common function to common file
Merge branch 'master' of github.com:soomla/soomla-unity3d-core

* 'master' of github.com:soomla/soomla-unity3d-core:
  Update submodules
  Remove unused constants (will be added in other modules)
  Added TAG to RandomReward
  Add warning logs to reward constructors
  Fix syntax error
  Consolidate reward method names and fix bridges
  Update ios-core submodule
  Fix spelling mistakes
  RandomReward checks which rewards can be given before it gives them
moved a common function to common file