UNC Path ability to impersonate specific user

@Vitor Santos, @Mike Moniz, thanks for the discussion. I did some digging in JIRA, as this has come up before. I think I found a DataSource that solves this, it just never found its way into core. I'll get this into a sprint for review so we can see about giving it a proper release. Code looks like this:

 

def user = hostProps.get("win.user")
def pass = hostProps.get("win.pass")

def path = instanceProps.get("wildvalue")

def command = "cmd /c dir ${path} /a | findstr \"File(s) Dir(s)\"";

if(user && pass)
{
	command = "cmd /c net use ${path} /user:${user} ${pass} & dir ${path} /a | findstr \"File(s) Dir(s)\"";
}

def stdout = (command.tokenize()).execute().text;
def result = stdout.readLines();

def fileInfo = result[-2];
def dirInfo = result[-1];

def tokens = fileInfo.split();

println("Files=${tokens[0]}");
println("UsedSpace=${tokens[2].replace(',','')}");

tokens = dirInfo.split();

println("Folders=${tokens[0]}");
println("FreeSpace=${tokens[2].replace(',','')}");

return 0;