fwr: support impersonate in operation engine

git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/backend/server/trunk/core@94833 6b8eccd3-e8c5-4e7d-8186-e12b5326b719
fwr: created flavor asset using factory

git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/backend/server/trunk/core@94834 6b8eccd3-e8c5-4e7d-8186-e12b5326b719
fwr: remove commited by mistake

git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/backend/server/trunk/core@94835 6b8eccd3-e8c5-4e7d-8186-e12b5326b719
fwr: remove commited by mistake

git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/backend/server/trunk/core@94837 6b8eccd3-e8c5-4e7d-8186-e12b5326b719
fwr: remove commited by mistake

git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/backend/server/trunk/core@94838 6b8eccd3-e8c5-4e7d-8186-e12b5326b719
adding empty directories
adding empty directories