Getting tests to run from build directory with spaces in it (#1981)

* [build.psm1] - mc.exe input file needs quotes

For filenames that have spaces or paths to that file that have spaces, the input filename needs to have quotes around it.

* Quoted more paths so tests run from directories with spaces

Found a few locations where paths weren't qutoed or escaped with '& ...' that are needed to get tests to run from build directories with spaces in them.

build.psm1

@@ -568,7 +568,7 @@ function Start-PSPester {
     }
 
     $PesterModule = [IO.Path]::Combine((Split-Path $powershell), "Modules", "Pester")
-    $Command += "Import-Module $PesterModule; "
+    $Command += "Import-Module '$PesterModule'; "
     $Command += "Invoke-Pester "
 
     $Command += "-OutputFormat ${OutputFormat} -OutputFile ${OutputFile} "
@@ -582,8 +582,8 @@ function Start-PSPester {
         $Command += "-Tag @('" + (${Tag} -join "','") + "') "
     }
 
-    $Command += $Path
-
+    $Command += "'" + $Path + "'"
+        
     Write-Verbose $Command
     # To ensure proper testing, the module path must not be inherited by the spawned process
     try {