Tests: Teach Server test to print server return code

This will aid in diagnosing failures.

Tests/Server/CMakeLists.txt

@@ -16,7 +16,7 @@ macro(do_test bsname file)
     )
 
   if (NOT test_result EQUAL 0)
-    message(SEND_ERROR "TEST FAILED")
+    message(SEND_ERROR "TEST FAILED: ${test_result}")
   endif()
 endmacro()
 

Tests/Server/server-test.py

@@ -111,4 +111,5 @@ for obj in testData:
     print("Completed")
 
 cmakelib.exitProc(proc)
+print('cmake-server exited: %d' % proc.returncode)
 sys.exit(proc.returncode)