Add possibility to define formatter (jar) file

[fabasoad]

Reasoning

Some of the companies have strict rules in terms of downloading binaries from external storages. In this case jar file is downloaded from external storage which is prohibited in many companies (as many companies use own artifact storage such as Artifactory or GHES).

Proposition

Add a possibility to define path to the jar file, either local one or web.

Benefits

• Increase security as it is not needed to download jar from external storage
• In case of local path - increasing speed as it is not needed to download jar everytime

[macisamuele]

Not opposed to similar changes, please provide a PR and I will be happy to merge it.

[fabasoad]

Hi @macisamuele! PR has been created. Please review. Thanks!