update: changed APIs according with sttk-go/sabi

[sttk]

This PR changes APIs of some classes according with sttk-go/sabi.

DaxBase

1. adds the class methods: startUpGlobalDaxSrcs, shutdownGlobalDaxSrcs, and removes fixGlobalDaxSrcs.
2. adds the instance methods: setUpLocalDaxSrc, freeLocalDaxSrc, freeAllLocalDaxSrcs and removes addLocalDaxSrc.
3. renames the instance method: close to end.

DaxSrc

1. adds the methods: setUp and end.

ErrOccasion

1. adds the method: toString().

Logic

1. renames the method: execute to run.

Proc and Txn

1. removes Proc class and added Txn class alternatively.

Runner, Seq and Para

1. moves the methods: Runner#runSeq and Runner#seq to Seq class.
2. moves the methods: Runner#runPara and Runner#para to Para class.