Renamed Test-Add-Member.Tests.ps1 to comply with naming standards

src/pester-tests/Test-Add-Member.Tests.ps1

@@ -1,7 +1,3 @@
-$here = Split-Path -Parent $MyInvocation.MyCommand.Path
-$sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path).Replace(".Tests.", ".")
-. "$here/$sut"
-
 Describe "test-Add-Member" {
    
     It "should be able to see a newly added member of an object" {
@@ -20,4 +16,4 @@ Describe "test-Add-Member" {
         $o.AnotherMember | Should Not BeNullOrEmpty
         $o.AnotherMember | Should Be "AnotherValue"
     }
-}
+}