BUG #15104: Fix writers exported in catalyst scripts.

Writers exported to catalyst script should not include properties like
WriteFrequency, FileName. Fixed that.

Change-Id: Iebd7859d5b957c614ee15d453e5f6505e5f7b56f
Merge topic '15104_fix_catalyst_writers'

8e56e935 BUG #15104: Fix writers exported in catalyst scripts.