double quote or "&" in test case name will generate invalid xml file

[wangzq]

I think we should escape the value in templating.ps1 before replacing the placeholders in xml template.

[nohwnd]

Note to self: When fixing this there is & in the Mock tests file commented out because of this issue.

[dlwyatt]

This is resolved in the v3.0-beta2 release, per commit 12df6f5 from @nohwnd.