Original PR description

The purpose of this commit is to add extension points that allow code
to be executed before and after the save of a record.

CallBack:
onWillSaveRecord is a callBack that will be executed before the
record save. If it returns false, it will prevent the save.

onSavedRecord is a callBack that will be executed after the save
    if it was done.
This commit will replace all the save overwrites by the onWillSaveRecord
and onSavedRecord callBack.

Observed problem:
We could notice that each of the overwrites of save in order to execute
for example a doAction after this one did not take into account the fact
that the save did not succeed.
For example, a required field is invalid and we try to save, then the
doAction will be executed without the "write" of the save.
The callBack onSavedRecord will prevent this common error.