More use of -WhatIf

[steviemcg]

The main ParTech.SimpleInstallScripts.psm1 module and nested modules such as 910-XP0.psm1 currently do not make use of the -WhatIf technique, like you can see used in SolrServer.psm1

See https://4sysops.com/archives/the-powershell-whatif-parameter/