1. Add: Security for Normal bucket files

1. Add: Shared file encryption for Normal bucket in FDB.

1. Add: Enable host wise compression for fdb

1. Add: Enable host wise security for fdb

1. Add: Required data on get asset in header.
2. Fix: Update and delete operations for normal bucket.

update: updating lazywrite interval
modification:removing unnecessary files 

1. Fix: Failed to get asset fro Asset type FDB.

1. Fix: Required Error type not set in case of delete operation

1. Fix: Error while updating data which is not present

1. Fix: Asset not saved to mixed bucket due to extra index field "name".
2: Fix: Failed to get saved asset due to missing "rowID" in index.

1. FIx: Error not handled on index update

* added encryption support in fdb 
* added feature of dynamic encryption key generation function

added global lock for lazy write in append  bucket 

moved packfile related functions in filemdl and done changes in fdb accordingly

File lock code commented

added feature of writing data lazily in corefdb Append bucket file

1. Fix: Failed to fetch data after FDB Update operation

1. Add: Return updated records in case of update