Use MSI installer instead of extract

[olljanat]

@dtPaTh / @ingohackl, Is either or you working on Dynatrace?

I don't understand that why you are breaking your own company code by just extracting MSI packages instead of fix the original packages that they would create service, IIS modules, etc without version numbers?

Using MSI installer helps of a lot to keep track which servers Dynatrace agent is installed.

For your information I just uploaded my own scripts to here which are actually using MSI installer and doing some other performance tuning stuff what you don't have here.