Cmdlets renamed to adhere on best practices.
Cmdlets renamed to adhere on best practices.

* Set-SqlMaxMemory to Set-DbaMaxMemory and all the relevant references
to Get-DbaMaxMemory changed to Test-DbaMaxMemory.
* Extra condition added in case anyone pipes Get-DbaMaxMemory into this
cmdlet.
* Licence added on the NOTES comment section

alevyinroc/dbatools,sqlpadawan/dbatools,kozloski/dbatools,Splaxi/dbatools,wsmelton/dbatools,dsolodow/dbatools,SirCaptainMitch/dbatools