.pytool: Add CI support for host based unit tests with results

https://bugzilla.tianocore.org/show_bug.cgi?id=2505

* Add plugin to build and run host based unit tests
* Add plugin that performs a DSC complete check DSC files
  used to build host based tests
* Update DscCompleteCheck plugin to ignore module INFs with
  a MODULE_TYPE of HOST_APPLICATION and library INFs that
  only support a module type of HOST_APPLICATION.
* Fix issues in XML reports from checkers.

Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Bret Barkelew <Bret.Barkelew@microsoft.com>

.pytool/Plugin/DependencyCheck/DependencyCheck.py

@@ -113,7 +113,7 @@ class DependencyCheck(ICiBuildPlugin):
                     overall_status += 1
 
         # If XML object exists, add results
-        if overall_status is not 0:
+        if overall_status != 0:
             tc.SetFailed("Failed with {0} errors".format(overall_status), "DEPENDENCYCHECK_FAILED")
         else:
             tc.SetSuccess()