changed ParsePathCommand.cs to get Split-Path unit tests to pass
changed ParsePathCommand.cs to get Split-Path unit tests to pass

PaulHigin/PowerShell,JamesWTruher/PowerShell-1,daxian-dbw/PowerShell,bmanikm/PowerShell,bingbing8/PowerShell,jsoref/PowerShell,kmosher/PowerShell,TravisEz13/PowerShell,KarolKaczmarek/PowerShell,jsoref/PowerShell,kmosher/PowerShell,PaulHigin/PowerShell,kmosher/PowerShell,bmanikm/PowerShell,bingbing8/PowerShell,TravisEz13/PowerShell,bingbing8/PowerShell,bingbing8/PowerShell,KarolKaczmarek/PowerShell,JamesWTruher/PowerShell-1,TravisEz13/PowerShell,jsoref/PowerShell,kmosher/PowerShell,bmanikm/PowerShell,JamesWTruher/PowerShell-1,PaulHigin/PowerShell,jsoref/PowerShell,JamesWTruher/PowerShell-1,daxian-dbw/PowerShell,daxian-dbw/PowerShell,daxian-dbw/PowerShell,KarolKaczmarek/PowerShell,TravisEz13/PowerShell,bmanikm/PowerShell,bingbing8/PowerShell,PaulHigin/PowerShell,jsoref/PowerShell,kmosher/PowerShell,bmanikm/PowerShell,KarolKaczmarek/PowerShell,KarolKaczmarek/PowerShell