GitLab

- Added transaction_id support
- Added timeout for on-going transaction
- Configuration option for transaction timeout value

 - commit bbfdm changes for all methods except set/add/delete only if the method is different to usp.raw and there is no transaction in progress
 - revert bbfdm changes when calling transaction_abort()
 - remove Omar's latest merge request

- Revert uci changes on transaction_abort

* set operation get applied only if all parameters are set correctly
* Added parameter key in setm_values
* Redundant error checks removed
* set operation output modified
  -- in case of success, only list status as success
  -- in case of failure, list failed paths, status and fault code

 - Rename tnx_* ubus objects to transaction_*
 - Use usp error codes as defined in bbf
 - Generate error when set/add/del operation initiated on usp.raw without
   starting a transaction

- cwmp specific parameters results into error/warning in obuspa, as
  cwmp dm parameters not available for usp proto
- dump_schema is used in obsupa to register the dm nodes, so, it makes
  more sense to dump only usp specific dm parameters

blobmsg_add_u32 has a problem; it prints max unsigned int 32 value 4294967295 as -1

 - Added instance_mode in existing usp ubus object methods, so that
   it can be used defined at run time by the caller, if instance
   number or instance mode required for the operation
   -- default is instance number
 - Added transaction related ubus objects in 'usp.raw' object
   -- txn_start (To start a transaction)
   -- txn_commit (To commit on-going transaction, cause uci reload config)
   -- txn_abort (To cancel on-going transaction)
 - Segregate usp and usp.raw object methods
   -- usp object is meant for user interaction and hence display output in
      pretty format
   -- usp.raw object is specifically designed to expose API for other application
      which needs to interact with datamodel
   -- CUD(Create, Update, Del) operation on usp object is guarded by txn_* apis
   -- For CUD operation on usp.raw, txn_* apis needs to be called explicitly

 - Added parallel call support for operate and get methods
 - Added unique_keys in 'dump_schema' method
 - Added in/out parameters in 'list_operate' method
 - Fix memory leaks
 - Fix invalid reads
 - performance optimizations