Improve `runtime` usage

[MikeKutz]

As a PL/SQL Developer
I want to keep by code clean
because: this is the way

Results

• hide global runtime for Log_utils
• add setters and getters
• add (optional) 3rd parameter for parameter "Hash"

[MikeKutz]

Need more info. (It's been 1.2 years since posting and I forgot what this was about)