Refs #3454 - Factorize use of execresult in site.st and fusionAgent.st
Refs #3454 - Remove use of useless classes
Refs #3454 - Fix typo and format
Merge pull request #86 from nperron/ust_3453/dev/3454_factorize_use_of_execresult

Refs #3454 - Factorize use of execresult in site.st and fusionAgent.st