Add 6971 to y2020/constants.cc

Change-Id: I381561b23ecc527761a5962f39cb9cdb89dfb32a
diff --git a/y2020/constants.cc b/y2020/constants.cc
index eefc158..131b0de 100644
--- a/y2020/constants.cc
+++ b/y2020/constants.cc
@@ -26,6 +26,7 @@
 
 const uint16_t kCompTeamNumber = 971;
 const uint16_t kPracticeTeamNumber = 9971;
+const uint16_t kSpareRoborioTeamNumber = 6971;
 
 const Values *DoGetValuesForTeam(uint16_t team) {
   Values *const r = new Values();
@@ -99,6 +100,7 @@
   switch (team) {
     // A set of constants for tests.
     case 1:
+    case kSpareRoborioTeamNumber:
       break;
 
     case kCompTeamNumber: