[ivi-tct][webapi] Update license to DSB from LICENSE 2.0

- Two files which with Intel author are under LICENSE 2.0, one need update to DSB,
  another(FileSystemManager_addStorageStateChangeListener.html)'s author is Samsung, Intel is updater.
Merge pull request #1518 from haoxli/tct/update-license

[ivi-tct][webapi] Update license to DSB from LICENSE 2.0